From 8748bd76e2e7aa0bb1df0ad8c54d1d78ea2cb5fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fran=C3=A7ois=20Turbelin?= <paco@kokali.net>
Date: Fri, 12 Dec 2025 13:55:55 +0100
Subject: [PATCH] Introduce a prices_sum helper to factorize the calculation on
 reports

---
 app/helpers/reports_helper.rb                 |  4 +++
 lib/reporting/report_template.rb              |  2 +-
 lib/reporting/reports/bulk_coop/allocation.rb |  2 +-
 lib/reporting/reports/bulk_coop/base.rb       |  2 +-
 .../reports/bulk_coop/customer_payments.rb    |  6 ++---
 .../reports/bulk_coop/supplier_report.rb      |  2 +-
 lib/reporting/reports/customers/base.rb       |  2 +-
 ...nterprise_fees_with_tax_report_by_order.rb |  4 +--
 ...rprise_fees_with_tax_report_by_producer.rb | 10 +++----
 .../order_cycle_customer_totals.rb            | 10 +++----
 ...er_cycle_distributor_totals_by_supplier.rb |  6 ++---
 .../order_cycle_supplier_totals.rb            |  6 ++---
 ...er_cycle_supplier_totals_by_distributor.rb |  4 +--
 lib/reporting/reports/packing/base.rb         |  2 +-
 .../payments/itemised_payment_totals.rb       |  8 +++---
 .../reports/payments/payment_totals.rb        | 12 ++++-----
 .../payments/payments_by_payment_type.rb      |  2 +-
 lib/reporting/reports/revenues_by_hub/base.rb |  4 +--
 .../sales_tax/sales_tax_totals_by_producer.rb | 26 ++++++++++---------
 lib/reporting/reports/sales_tax/tax_types.rb  |  2 +-
 lib/reporting/reports/xero_invoices/base.rb   | 20 +++++++-------
 spec/helpers/admin/reports_helper_spec.rb     |  6 +++++
 22 files changed, 77 insertions(+), 65 deletions(-)

diff --git a/app/helpers/reports_helper.rb b/app/helpers/reports_helper.rb
index 1caab98aa9..09fe3d5d10 100644
--- a/app/helpers/reports_helper.rb
+++ b/app/helpers/reports_helper.rb
@@ -61,4 +61,8 @@ module ReportsHelper
     datetime = Time.zone.parse(datetime) if datetime.is_a? String
     datetime.strftime('%Y-%m-%d %H:%M')
   end
+
+  def prices_sum(prices_list)
+    prices_list.sum(&:to_f).round(2)
+  end
 end
diff --git a/lib/reporting/report_template.rb b/lib/reporting/report_template.rb
index 2e2ad8a614..d8cadd878b 100644
--- a/lib/reporting/report_template.rb
+++ b/lib/reporting/report_template.rb
@@ -88,7 +88,7 @@ module Reporting
     #   summary_row: proc do |group_key, items, rows|
     #     {
     #       quantity: rows.map(&:quantity).sum(&:to_i),
-    #       price: "#{rows.map(&:price).sum(&:to_f).round(2)} #{currency_symbol}"
+    #       price: "#{prices_sum(rows.map(&:price))} #{currency_symbol}"
     #     }
     #   end,
     #   summary_row_class: "", # by default 'text-bold'
diff --git a/lib/reporting/reports/bulk_coop/allocation.rb b/lib/reporting/reports/bulk_coop/allocation.rb
index ca951454d2..664fdd600c 100644
--- a/lib/reporting/reports/bulk_coop/allocation.rb
+++ b/lib/reporting/reports/bulk_coop/allocation.rb
@@ -32,7 +32,7 @@ module Reporting
               summary_row: proc do |_key, items, rows|
                 line_items = items.flatten
                 {
-                  sum_total: rows.map(&:sum_total).sum(&:to_f).round(2),
+                  sum_total: prices_sum(rows.map(&:sum_total)),
                   total_available: total_available(line_items),
                   unallocated: remainder(line_items),
                   max_quantity_excess: max_quantity_excess(line_items)
diff --git a/lib/reporting/reports/bulk_coop/base.rb b/lib/reporting/reports/bulk_coop/base.rb
index 0d9e745252..f701261919 100644
--- a/lib/reporting/reports/bulk_coop/base.rb
+++ b/lib/reporting/reports/bulk_coop/base.rb
@@ -96,7 +96,7 @@ module Reporting
         def total_amount(line_items)
           line_items.map { |li|
             scaled_final_weight_volume(li)
-          }.sum(&:to_f).round(2)
+          }.sum(&:to_f).round(3)
         end
 
         def scaled_final_weight_volume(line_item)
diff --git a/lib/reporting/reports/bulk_coop/customer_payments.rb b/lib/reporting/reports/bulk_coop/customer_payments.rb
index 6746bfcaff..c03c8ca345 100644
--- a/lib/reporting/reports/bulk_coop/customer_payments.rb
+++ b/lib/reporting/reports/bulk_coop/customer_payments.rb
@@ -21,15 +21,15 @@ module Reporting
         private
 
         def customer_payments_total_cost(line_items)
-          unique_orders(line_items).map(&:total).sum(&:to_f).round(2)
+          prices_sum(unique_orders(line_items).map(&:total))
         end
 
         def customer_payments_amount_owed(line_items)
-          unique_orders(line_items).map(&:new_outstanding_balance).sum(&:to_f).round(2)
+          prices_sum(unique_orders(line_items).map(&:new_outstanding_balance))
         end
 
         def customer_payments_amount_paid(line_items)
-          unique_orders(line_items).map(&:payment_total).sum(&:to_f).round(2)
+          prices_sum(unique_orders(line_items).map(&:payment_total))
         end
 
         def unique_orders(line_items)
diff --git a/lib/reporting/reports/bulk_coop/supplier_report.rb b/lib/reporting/reports/bulk_coop/supplier_report.rb
index 2195ec8890..58c8e31591 100644
--- a/lib/reporting/reports/bulk_coop/supplier_report.rb
+++ b/lib/reporting/reports/bulk_coop/supplier_report.rb
@@ -32,7 +32,7 @@ module Reporting
               summary_row: proc do |_key, items, rows|
                 line_items = items.flatten
                 {
-                  sum_total: rows.map(&:sum_total).sum(&:to_f).round(2),
+                  sum_total: prices_sum(rows.map(&:sum_total)),
                   units_required: units_required(line_items),
                   unallocated: remainder(line_items),
                   max_quantity_excess: max_quantity_excess(line_items)
diff --git a/lib/reporting/reports/customers/base.rb b/lib/reporting/reports/customers/base.rb
index 19f1d7e271..94d8f0c48b 100644
--- a/lib/reporting/reports/customers/base.rb
+++ b/lib/reporting/reports/customers/base.rb
@@ -33,7 +33,7 @@ module Reporting
                          },
             shipping_method: proc { |orders| last_completed_order(orders).shipping_method&.name },
             total_orders: proc { |orders| orders.count },
-            total_incl_tax: proc { |orders| orders.map(&:total).sum(&:to_f).round(2) },
+            total_incl_tax: proc { |orders| prices_sum(orders.map(&:total)) },
             last_completed_order_date: proc { |orders| last_completed_order_date(orders) },
           }
         end
diff --git a/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_order.rb b/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_order.rb
index 58a8cd6514..380e475172 100644
--- a/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_order.rb
+++ b/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_order.rb
@@ -158,7 +158,7 @@ module Reporting
         end
 
         def enterprise_fees_sum(order)
-          amount = enterprise_fees(order).map(&:amount).sum(&:to_f).round(2)
+          amount = prices_sum(enterprise_fees(order).map(&:amount))
           apply_voucher_on_amount(order, amount)
         end
 
@@ -183,7 +183,7 @@ module Reporting
           query = query.inclusive if included == true
           query = query.additional if added == true
           amount =
-            query.where(adjustable: enterprise_fees(order)).map(&:amount).sum(&:to_f).round(2)
+            prices_sum(query.where(adjustable: enterprise_fees(order)).map(&:amount))
           apply_voucher_on_amount(order, amount)
         end
 
diff --git a/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_producer.rb b/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_producer.rb
index 002ec5916b..1f5deec4a1 100644
--- a/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_producer.rb
+++ b/lib/reporting/reports/enterprise_fee_summary/enterprise_fees_with_tax_report_by_producer.rb
@@ -232,7 +232,7 @@ module Reporting
                 line_item.supplier_id == supplier_id
               end
 
-            tax_for_enterprise_fees = rows.map(&:tax).sum(&:to_f).round(2)
+            tax_for_enterprise_fees = prices_sum(rows.map(&:tax))
             total_excl_tax = total_fees_excl_tax(items) + line_items_excl_tax(line_items)
             tax = tax_for_enterprise_fees + tax_for_line_items(line_items)
             {
@@ -280,18 +280,18 @@ module Reporting
         end
 
         def line_items_excl_tax(line_items)
-          cost_of_line_items(line_items) - line_items.map(&:included_tax).sum(&:to_f).round(2)
+          cost_of_line_items(line_items) - prices_sum(line_items.map(&:included_tax))
         end
 
         def cost_of_line_items(line_items)
-          line_items.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(line_items.map(&:amount))
         end
 
         # This query gets called twice for each set of line_items, ideally it would be cached.
         def tax_for_line_items(line_items)
-          line_items.map do |line_item|
+          prices_sum(line_items.map do |line_item|
             line_item.adjustments.eligible.tax.map(&:amount).sum(&:to_f)
-          end.sum(&:to_f).round(2)
+          end)
         end
 
         def included_tax_for_order_ids(order_ids, enterprise_fee_ids)
diff --git a/lib/reporting/reports/orders_and_fulfillment/order_cycle_customer_totals.rb b/lib/reporting/reports/orders_and_fulfillment/order_cycle_customer_totals.rb
index 3c93beb056..b8e74ee826 100644
--- a/lib/reporting/reports/orders_and_fulfillment/order_cycle_customer_totals.rb
+++ b/lib/reporting/reports/orders_and_fulfillment/order_cycle_customer_totals.rb
@@ -23,9 +23,9 @@ module Reporting
             variant: variant_name,
 
             quantity: proc { |line_items| line_items.map(&:quantity).sum(&:to_i) },
-            item_price: proc { |line_items| line_items.map(&:amount).sum(&:to_f).round(2) },
+            item_price: proc { |line_items| prices_sum(line_items.map(&:amount)) },
             item_fees_price: proc { |line_items|
-              line_items.map(&:amount_with_adjustments).sum(&:to_f).round(2)
+              prices_sum(line_items.map(&:amount_with_adjustments))
             },
             admin_handling_fees: proc { |_line_items| "" },
             ship_price: proc { |_line_items| "" },
@@ -68,7 +68,7 @@ module Reporting
             order_number: proc { |line_items| line_items.first.order.number },
             date: proc { |line_items| line_items.first.order.completed_at.strftime("%F %T") },
             final_weight_volume: proc { |line_items|
-              line_items.map(&:final_weight_volume).sum(&:to_f).round(2)
+              line_items.map(&:final_weight_volume).sum(&:to_f).round(3)
             },
             shipment_state: proc { |line_items| line_items.first.order.shipment_state },
           }
@@ -129,8 +129,8 @@ module Reporting
           {
             hub: rows.last.hub,
             customer: rows.last.customer,
-            item_price: rows.map(&:item_price).sum(&:to_f).round(2),
-            item_fees_price: rows.map(&:item_fees_price).sum(&:to_f).round(2),
+            item_price: prices_sum(rows.map(&:item_price)),
+            item_fees_price: prices_sum(rows.map(&:item_fees_price)),
             admin_handling_fees: order.admin_and_handling_total,
             ship_price: order.ship_total,
             pay_fee_price: order.payment_fee,
diff --git a/lib/reporting/reports/orders_and_fulfillment/order_cycle_distributor_totals_by_supplier.rb b/lib/reporting/reports/orders_and_fulfillment/order_cycle_distributor_totals_by_supplier.rb
index 45d3133b2c..39263454a7 100644
--- a/lib/reporting/reports/orders_and_fulfillment/order_cycle_distributor_totals_by_supplier.rb
+++ b/lib/reporting/reports/orders_and_fulfillment/order_cycle_distributor_totals_by_supplier.rb
@@ -12,7 +12,7 @@ module Reporting
             variant: variant_name,
             quantity: proc { |line_items| line_items.to_a.map(&:quantity).sum(&:to_i) },
             curr_cost_per_unit: proc { |line_items| line_items.first.price },
-            total_cost: proc { |line_items| line_items.map(&:amount).sum(&:to_f).round(2) },
+            total_cost: proc { |line_items| prices_sum(line_items.map(&:amount)) },
             total_shipping_cost: proc { |_line_items| "" },
             shipping_method: proc { |line_items| line_items.first.order.shipping_method&.name }
           }
@@ -25,9 +25,9 @@ module Reporting
               header: proc { |key, _items, _rows| "#{I18n.t(:report_header_hub)} #{key}" },
               summary_row: proc do |_key, line_items, rows|
                 {
-                  total_cost: rows.map(&:total_cost).sum(&:to_f).round(2),
+                  total_cost: prices_sum(rows.map(&:total_cost)),
                   total_shipping_cost:
-                    line_items.map(&:first).map(&:order).uniq.map(&:ship_total).sum(&:to_f).round(2)
+                    prices_sum(line_items.map(&:first).map(&:order).uniq.map(&:ship_total))
                 }
               end
             }
diff --git a/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals.rb b/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals.rb
index 1dfa1c2adf..f3edb2e375 100644
--- a/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals.rb
+++ b/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals.rb
@@ -12,7 +12,7 @@ module Reporting
             quantity: proc { |line_items| line_items.map(&:quantity).sum(&:to_i) },
             total_units: proc { |line_items| total_units(line_items) },
             curr_cost_per_unit: proc { |line_items| line_items.first.price },
-            total_cost: proc { |line_items| line_items.map(&:amount).sum(&:to_f).round(2) },
+            total_cost: proc { |line_items| prices_sum(line_items.map(&:amount)) },
             sku: variant_sku,
             producer_charges_sales_tax?: supplier_charges_sales_tax?,
             product_tax_category:
@@ -27,14 +27,14 @@ module Reporting
               summary_row: proc do |_key, _items, rows|
                 total_units = rows.map(&:total_units)
                 summary_total_units = if total_units.all?(&:present?)
-                                        rows.map(&:total_units).sum(&:to_f)
+                                        rows.map(&:total_units).sum(&:to_f).round(3)
                                       else
                                         " "
                                       end
                 {
                   quantity: rows.map(&:quantity).sum(&:to_i),
                   total_units: summary_total_units,
-                  total_cost: rows.map(&:total_cost).sum(&:to_f).round(2)
+                  total_cost: prices_sum(rows.map(&:total_cost))
                 }
               end
             }
diff --git a/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals_by_distributor.rb b/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals_by_distributor.rb
index 68dcd7a8b6..714c19b7bc 100644
--- a/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals_by_distributor.rb
+++ b/lib/reporting/reports/orders_and_fulfillment/order_cycle_supplier_totals_by_distributor.rb
@@ -12,7 +12,7 @@ module Reporting
             hub: hub_name,
             quantity: proc { |line_items| line_items.to_a.map(&:quantity).sum(&:to_i) },
             curr_cost_per_unit: proc { |line_items| line_items.first.price },
-            total_cost: proc { |line_items| line_items.map(&:amount).sum(&:to_f).round(2) },
+            total_cost: proc { |line_items| prices_sum(line_items.map(&:amount)) },
             shipping_method: proc { |line_items| line_items.first.order.shipping_method&.name }
           }
         end
@@ -32,7 +32,7 @@ module Reporting
               summary_row: proc do |_key, _items, rows|
                 {
                   quantity: rows.map(&:quantity).sum(&:to_i),
-                  total_cost: rows.map(&:total_cost).sum(&:to_f).round(2)
+                  total_cost: prices_sum(rows.map(&:total_cost))
                 }
               end,
             }
diff --git a/lib/reporting/reports/packing/base.rb b/lib/reporting/reports/packing/base.rb
index 4f2c7d2cf1..b0bfa26bde 100644
--- a/lib/reporting/reports/packing/base.rb
+++ b/lib/reporting/reports/packing/base.rb
@@ -73,7 +73,7 @@ module Reporting
           proc do |_key, _items, rows|
             {
               quantity: rows.map(&:quantity).sum(&:to_i),
-              price: rows.map(&:price).sum(&:to_f).round(2)
+              price: prices_sum(rows.map(&:price))
             }
           end
         end
diff --git a/lib/reporting/reports/payments/itemised_payment_totals.rb b/lib/reporting/reports/payments/itemised_payment_totals.rb
index 48a4f7f6b3..a27463c602 100644
--- a/lib/reporting/reports/payments/itemised_payment_totals.rb
+++ b/lib/reporting/reports/payments/itemised_payment_totals.rb
@@ -8,12 +8,12 @@ module Reporting
           {
             payment_state: proc { |orders| payment_state(orders.first) },
             distributor: proc { |orders| orders.first.distributor.name },
-            product_total_price: proc { |orders| orders.map(&:item_total).sum(&:to_f).round(2) },
-            shipping_total_price: proc { |orders| orders.map(&:ship_total).sum(&:to_f).round(2) },
+            product_total_price: proc { |orders| prices_sum(orders.map(&:item_total)) },
+            shipping_total_price: proc { |orders| prices_sum(orders.map(&:ship_total)) },
             outstanding_balance_price: proc do |orders|
-              orders.map(&:outstanding_balance).sum(&:to_f).round(2)
+              prices_sum(orders.map(&:outstanding_balance))
             end,
-            total_price: proc { |orders| orders.map(&:total).sum(&:to_f).round(2) }
+            total_price: proc { |orders| prices_sum(orders.map(&:total)) }
           }
         end
       end
diff --git a/lib/reporting/reports/payments/payment_totals.rb b/lib/reporting/reports/payments/payment_totals.rb
index 1dc89fd101..389ade30d7 100644
--- a/lib/reporting/reports/payments/payment_totals.rb
+++ b/lib/reporting/reports/payments/payment_totals.rb
@@ -8,13 +8,13 @@ module Reporting
           {
             payment_state: proc { |orders| payment_state(orders.first) },
             distributor: proc { |orders| orders.first.distributor.name },
-            product_total_price: proc { |orders| orders.map(&:item_total).sum(&:to_f).round(2) },
-            shipping_total_price: proc { |orders| orders.map(&:ship_total).sum(&:to_f).round(2) },
-            total_price: proc { |orders| orders.map(&:total).sum(&:to_f).round(2) },
+            product_total_price: proc { |orders| prices_sum(orders.map(&:item_total)) },
+            shipping_total_price: proc { |orders| prices_sum(orders.map(&:ship_total)) },
+            total_price: proc { |orders| prices_sum(orders.map(&:total)) },
             eft_price: proc { |orders| total_by_payment_method(orders, "EFT") },
             paypal_price: proc { |orders| total_by_payment_method(orders, "PayPal") },
             outstanding_balance_price: proc { |orders|
-              orders.map(&:outstanding_balance).sum(&:to_f).round(2)
+              prices_sum(orders.map(&:outstanding_balance))
             }
           }
         end
@@ -22,9 +22,9 @@ module Reporting
         private
 
         def total_by_payment_method(orders, pay_method)
-          orders.map(&:payments).flatten.select { |payment|
+          prices_sum(orders.map(&:payments).flatten.select { |payment|
             payment.completed? && payment.payment_method&.name.to_s.include?(pay_method)
-          }.map(&:amount).sum(&:to_f).round(2)
+          }.map(&:amount))
         end
       end
     end
diff --git a/lib/reporting/reports/payments/payments_by_payment_type.rb b/lib/reporting/reports/payments/payments_by_payment_type.rb
index a0c66977af..0f1835920c 100644
--- a/lib/reporting/reports/payments/payments_by_payment_type.rb
+++ b/lib/reporting/reports/payments/payments_by_payment_type.rb
@@ -18,7 +18,7 @@ module Reporting
             payment_state: proc { |payments| payment_state(payments.first.order) },
             distributor: proc { |payments| payments.first.order.distributor.name },
             payment_type: proc { |payments| payments.first.payment_method&.name },
-            total_price: proc { |payments| payments.map(&:amount).sum(&:to_f).round(2) }
+            total_price: proc { |payments| prices_sum(payments.map(&:amount)) }
           }
         end
       end
diff --git a/lib/reporting/reports/revenues_by_hub/base.rb b/lib/reporting/reports/revenues_by_hub/base.rb
index 71eb6f0d88..ef53b1dca3 100644
--- a/lib/reporting/reports/revenues_by_hub/base.rb
+++ b/lib/reporting/reports/revenues_by_hub/base.rb
@@ -60,8 +60,8 @@ module Reporting
           grouped_orders.each do |orders|
             voucher_adjustments = calculate_voucher_adjustments(orders)
 
-            total_incl_tax = orders.map(&:total).sum(&:to_f).round(2)
-            total_tax = orders.map(&:total_tax).sum(&:to_f).round(2) + voucher_adjustments
+            total_incl_tax = prices_sum(orders.map(&:total))
+            total_tax = prices_sum(orders.map(&:total_tax)) + voucher_adjustments
             total_excl_tax = total_incl_tax - total_tax
 
             @tax_data[distributor(orders).id] = {
diff --git a/lib/reporting/reports/sales_tax/sales_tax_totals_by_producer.rb b/lib/reporting/reports/sales_tax/sales_tax_totals_by_producer.rb
index 8d6fd2066f..2331909fb1 100644
--- a/lib/reporting/reports/sales_tax/sales_tax_totals_by_producer.rb
+++ b/lib/reporting/reports/sales_tax/sales_tax_totals_by_producer.rb
@@ -77,11 +77,11 @@ module Reporting
               summary_row: proc do |_key, items, _rows|
                 line_items = items.flat_map(&:second).flatten.uniq
                 total_excl_tax =
-                  line_items.map(&:amount).sum(&:to_f).round(2) -
-                  line_items.map(&:included_tax).sum(&:to_f).round(2)
-                tax = line_items.map do |line_item|
+                  prices_sum(line_items.map(&:amount)) -
+                  prices_sum(line_items.map(&:included_tax))
+                tax = prices_sum(line_items.map do |line_item|
                   line_item.adjustments.eligible.tax.map(&:amount).sum(&:to_f)
-                end.sum(&:to_f).round(2)
+                end)
                 {
                   total_excl_tax:,
                   tax:,
@@ -127,17 +127,19 @@ module Reporting
         end
 
         def total_excl_tax(query_result_row)
-          line_items(query_result_row).map(&:amount).sum(&:to_f).round(2) -
-            line_items(query_result_row).map(&:included_tax).sum(&:to_f).round(2)
+          prices_sum(line_items(query_result_row).map(&:amount)) -
+            prices_sum(line_items(query_result_row).map(&:included_tax))
         end
 
         def tax(query_result_row)
-          line_items(query_result_row)&.map do |line_item|
-            line_item.adjustments.eligible.tax
-              .where(originator_id: tax_rate_id(query_result_row))
-              .map(&:amount)
-              .sum(&:to_f)
-          end&.sum(&:to_f)&.round(2)
+          prices_sum(
+            line_items(query_result_row).to_a.map do |line_item|
+              line_item.adjustments.eligible.tax
+                .where(originator_id: tax_rate_id(query_result_row))
+                .map(&:amount)
+                .sum(&:to_f)
+            end
+          )
         end
 
         def total_incl_tax(query_result_row)
diff --git a/lib/reporting/reports/sales_tax/tax_types.rb b/lib/reporting/reports/sales_tax/tax_types.rb
index acd141af0c..9f2c62bafd 100644
--- a/lib/reporting/reports/sales_tax/tax_types.rb
+++ b/lib/reporting/reports/sales_tax/tax_types.rb
@@ -53,7 +53,7 @@ module Reporting
         end
 
         def tax_included_in(line_item)
-          line_item.adjustments.tax.inclusive.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(line_item.adjustments.tax.inclusive.map(&:amount))
         end
       end
     end
diff --git a/lib/reporting/reports/xero_invoices/base.rb b/lib/reporting/reports/xero_invoices/base.rb
index 0e1ab55a51..257f65051a 100644
--- a/lib/reporting/reports/xero_invoices/base.rb
+++ b/lib/reporting/reports/xero_invoices/base.rb
@@ -207,29 +207,29 @@ module Reporting
         end
 
         def total_untaxable_products(order)
-          order.line_items.without_tax.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.line_items.without_tax.map(&:amount))
         end
 
         def total_taxable_products(order)
-          order.line_items.with_tax.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.line_items.with_tax.map(&:amount))
         end
 
         def total_untaxable_fees(order)
-          order.all_adjustments.enterprise_fee.where(tax_category: nil)
-            .map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.all_adjustments.enterprise_fee.where(tax_category: nil)
+            .map(&:amount))
         end
 
         def total_taxable_fees(order)
-          order.all_adjustments.enterprise_fee.where.not(tax_category: nil)
-            .map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.all_adjustments.enterprise_fee.where.not(tax_category: nil)
+            .map(&:amount))
         end
 
         def total_shipping(order)
-          order.all_adjustments.shipping.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.all_adjustments.shipping.map(&:amount))
         end
 
         def total_transaction(order)
-          order.all_adjustments.payment_fee.map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.all_adjustments.payment_fee.map(&:amount))
         end
 
         def tax_on_shipping_s(order)
@@ -246,11 +246,11 @@ module Reporting
         end
 
         def total_untaxable_admin_adjustments(order)
-          order.adjustments.admin.where(tax_category: nil).map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.adjustments.admin.where(tax_category: nil).map(&:amount))
         end
 
         def total_taxable_admin_adjustments(order)
-          order.adjustments.admin.where.not(tax_category: nil).map(&:amount).sum(&:to_f).round(2)
+          prices_sum(order.adjustments.admin.where.not(tax_category: nil).map(&:amount))
         end
 
         def detail?
diff --git a/spec/helpers/admin/reports_helper_spec.rb b/spec/helpers/admin/reports_helper_spec.rb
index 6f2f0c33e4..70106c839e 100644
--- a/spec/helpers/admin/reports_helper_spec.rb
+++ b/spec/helpers/admin/reports_helper_spec.rb
@@ -21,4 +21,10 @@ RSpec.describe ReportsHelper do
       expect(select_options).to eq [[payment_method.name, payment_method.id]]
     end
   end
+
+  describe "#prices_sum" do
+    it "sums to prices list roundind to 2 decimals" do
+      expect(helper.prices_sum([1, nil, 2.333333, 1.5, 2.0])).to eq(6.83)
+    end
+  end
 end