managers are given an annual budget, which is split into months. At the end of each month, the manager receives a statement comparing actual monthly performance against budget. The statement for the Cowly restaurant for the most recent completed month is as follows: Actual Budget Variance Number of customers 1,800 1,500 $ $ Revenue 87,300 75,000 12,300 F Costs: Food and drink 26,100 22,500 3,600 A Staff wages 38,250 31,500 6,750 A Heat, light and power 8,100 7,500 600 A Rent, rates and other overheads 12,600 12,000 600 A Profit 2,250 1,500 750 F Notes: (1) Rent, rates and other overheads are apportioned to its restaurants by Yumi Co's head office, based on a fixed annual charge. (2) All other budgeted costs are treated as variable costs, based on the expected number of customers. Yumi Co currently adopts an incremental approach to budgeting, with the annual budget figures for each year