[#4183] Implemented Contract#profit_budget and Deliverable#profit_budget.

app/models/contract.rb

@@ -31,7 +31,7 @@ class Contract < ActiveRecord::Base
 
   [:status, :contract_type, :labor_spent, :overhead_spent,
    :fixed_spent, :fixed_budget, :total_spent,
-   :markup_spent, :markup_budget, :profit_spent, :profit_budget,
+   :markup_spent, :markup_budget, :profit_spent,
    :discount_spent, :discount_budget, :client_point_of_contact,
    :estimated_hour_spent
   ].each do |mthd|
@@ -58,6 +58,11 @@ class Contract < ActiveRecord::Base
     deliverables.inject(0) {|total, deliverable| total += deliverable.total }
   end
 
+  # OPTIMIZE: N+1
+  def profit_budget
+    deliverables.inject(0) {|total, deliverable| total += deliverable.profit_budget }
+  end
+
   PaymentTerms = {
     :net_0 => :text_payment_terms_net_0,
     :net_15 => :text_payment_terms_net_15,