fixed bugs # 12,13,14,7

updated the following files:
Controllers:
-CashFlow
-FeedsInventory
-IndividualCost
-InitialCapital
-Mortality
-PettyCash
-Reports
-Sales
Domain Classes:
-FeedsInventory
-FeedsQuantity
-IndividualCost
-MedicineInventory
-MedicineQUantity
Services:
-Reports
-Tools
pages:
-feedsInventory _form & _form_qty
-individualCost _feedsCharge, _form, _medCharge
-medicineInventory _form, _form_qty
-main.css
javascript:
-update.js
jrxml:
accountPayable
-accountReceivable
-feedsPurchased
-medicinesPurchased