Jake's Roof Repair has provided the following data concerning its costs Fixed Cost per Month Cost per Repair-Hour Wages and salaries Parts and supplies Equipment depreciation $15.00 7.50 0.55 1.90 $2,710 Truck operating expenses 5,730 $ 4,620 3,840 s5,7301.90 0.50 Rent Administrative expenses For example, wages and salaries should be $20,600 plus $15.00 per repair-hour. The company expected to work 2,700 repair-hours in May, but actually worked 2,600 repair-hours. The company expects its sales to be $46.00 per repair-hour