23-4 Compute labor cost and labor quantity variance. (LO 3,4), AP Monte Services, Inc. is trying to establish the standard labor cost of a typical oil change. The following data have been collected from time and motion studies conducted over the past moeth. Actual time spent on the oil change 1.0 hour Hourly wage rate Payroll taxes Setup and downtime Cleanup and rest periods Fringe benefits $12 10% of wage rate 20% of actual labor time 30% of actual labor time 25% of wage rate Instructions (a) Determine the standard direct labor hours per oil change. (b) Detemine the standard direct labor hourly rate. (c) Determine the standard direct labor cost per oil change. (d) If an oil change took 1.6 hours at the standard hourly rate, what was the direct labor quantity variance