S. 37(1) : Business expenditure-Entertainment expenses-Major expenses are through banking channel-Rebates and discounts-Revenue cannot decide what constitutes reasonable expenditure-Enterprise resource planning software expense-Capitalised in books of account-Allowable as revenue expenditure, though the claim was not made in the original or revised return-Advertisement expenses-Purchase of Ice boxes, plastic tables and chairs, bearing logo-Allowable as business expenditure. [R. 46A]