Knight Company reports the following costs and expenses in May. Factory utilities $15,900 Direct labor $74,100 Depreciation on factory equipment 13,950 Sales salaries 47,000 Depreciation on delivery trucks 3,900 Property taxes on factory building 3,000 Indirect factory labor 49,000 Repairs to office equipment 1,600 Indirect materials 81,300 Factory repairs 2,750 Direct materials used 138,700 Advertising 16,200 Factory manager’s salary 8,500 Office supplies used 2,930