our commission is now shown on cart page

front-api/db/migrate/20150614043952_add_commission_to_item_in_cart.rb

@@ -0,0 +1,5 @@
+class AddCommissionToItemInCart < ActiveRecord::Migration
+  def change
+    add_column :item_in_carts, :commision, :decimal
+  end
+end

front-api/db/migrate/20150614050336_rename_commission_in_item_in_cart.rb

@@ -0,0 +1,6 @@
+class RenameCommissionInItemInCart < ActiveRecord::Migration
+  def change
+  	remove_column :item_in_carts, :commision
+    add_column :item_in_carts, :commission, :decimal
+  end
+end

front-api/db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150420044444) do
+ActiveRecord::Schema.define(version: 20150614050336) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "plpgsql"
@@ -104,6 +104,7 @@ ActiveRecord::Schema.define(version: 20150420044444) do
     t.datetime "updated_at", null: false
     t.integer  "count"
     t.decimal  "price"
+    t.decimal  "commission"
   end
 
   create_table "item_in_groups", force: :cascade do |t|

front-api/models/item_in_cart.rb

@@ -13,6 +13,7 @@ class ItemInCart < ActiveRecord::Base
       item_in_cart ||= ItemInCart.new(cart_id: cart_id, item_id: item_id)
       item_in_cart.count = count
       item_in_cart.price = item_in_cart.item.list_price
+      item_in_cart.commission = ((item_in_cart.item.list_price - item_in_cart.item.current_input_price) / (item_in_cart.item.current_input_price)).round(2)
       item_in_cart.save!
       item_in_cart.destroy! if count <= 0
     end