Given Data P10-10: COTTONWOOD HOSPITAL Number of blood tests 900 Number of smears 2,700 Number of plates purchased 16,000 Cost of plates Quantity discount allowed Unused plates at month end Labor hours Cost of labor hours EA $ 38,400 4% 2,000 1,800 6969 $ 18,450 $ 11,700 Variable overhead costs Nationwide averages: Number of plates per test 3 Cost per plate $ SA 2.50 Time for smear (hours) 0.30 Time for blood test (hours) 0.60 Average cost of lab time per hour Variable overhead rate per hour 5969 $ 12.00 $ 6.00