3. OfficeMart has found an error in its data. The percentage of selling and administrative overhead attributable to processing orders should be changed to 30% from 45% and the percentage attributable to supporting customers should be changed to 40% from 25%. A B 1 Chapter 5: Applying Excel 2 3 Data 4 Manufacturing overhead $ 500,000 5 Selling and administrative overhead $ 300,000 10 6 7 8 89 Manufacturing overhead 9 Selling and administrative overhead 10 Total activity 11 12 13 OfficeMart orders: 14 Customers 15 Orders 16 Number of filing cabinets ordered in total 17 Selling price 18 Direct materials 19 Direct labor C D E Assembling Processing Units Orders Supporting Customers Other 50% 35% 5% 10% 10% 30% 40% 20% 1,000 250 100 units orders customers 1 customer 20 orders 80 units 595 $ 180 $ 50