Marks Corporation has two operating departments, Drilling and Grinding, and an office. The three categories of office expenses are allocated to the two operating departments using different allocation bases. The following information is available for the current period: Office Expenses Salaries Depreciation Advertising Department Drilling Grinding Total Multiple Choice O $59,813. $69,063. Total $ 50,000 30,000 70,000 The amount of the total office expenses that should be allocated to Grinding for the current period is (Do not round your intermediate calculations.) $90,313. Number of employees 2,600 3,900 6,500 Allocation Basis Number of employees Cost of goods sold Percentage of total sales Sales $357,500 522,500 $880,000 Cost of goods sold $105,000 175,000 $280,000