Stub base_price and fees on variant serializer. Calculate basePricePercentage on variant.

app/assets/javascripts/darkswarm/services/variants.js.coffee

@@ -7,4 +7,5 @@ Darkswarm.factory 'Variants', ->
     extend: (variant)->
       variant.getPrice = ->
         variant.price * variant.line_item.quantity
+      variant.basePricePercentage = variant.base_price / variant.price * 100
       variant

app/serializers/api/variant_serializer.rb

@@ -1,8 +1,19 @@
 class Api::VariantSerializer < ActiveModel::Serializer
   attributes :id, :is_master, :count_on_hand, :name_to_display, :unit_to_display, 
-    :on_demand, :price
+    :on_demand, :price, :fees
 
   def price
     object.price_with_fees(options[:current_distributor], options[:current_order_cycle])
   end
+
+  def base_price
+    1.00
+  end
+
+  def fees
+    {admin: 1.23, sales: 4.56, packing: 7.89, transport: 0.12}
+  end
 end
+
+
+# price_without_fees / price

spec/javascripts/unit/darkswarm/services/variants_spec.js.coffee

@@ -5,6 +5,8 @@ describe 'Variants service', ->
   beforeEach ->
     variant =
       id: 1
+      base_price: 80
+      price: 100
     module 'Darkswarm'
     inject ($injector)->
       Variants =  $injector.get("Variants")
@@ -19,3 +21,5 @@ describe 'Variants service', ->
   it "will return the same object as passed", ->
     expect(Variants.register(variant)).toBe variant
 
+  it "initialises base price percentage", ->
+    expect(Variants.register(variant).basePricePercentage).toEqual 80