Use the following data to compute total factory overhead costs for the month: Sales commissions $ 11,700 Direct labor 40,500 Indirect materials 16,100 Factory manager salaries 8,100 Factory supplies 9,900 Indirect labor 7,200 Depreciation—office equipment 5,900 Direct materials 41,400 Corporate office salaries 43,400 Depreciation—factory equipment 8,400