Engines Done Right Co. is trying to establish the standard labor cost of a typical engine tune-up. The following data have been collected from time and motion studies conducted over the past month. (a) Your answer has been saved. See score details after the due date. Determine the standard direct labor hours per tune-up. (Round answer to 2 decimal places, e.g. 15.10.) Standard direct labor hours per tune-up hours Determine the standard direct labor hourly rate. (Round answer to 2 decimal places, e.g. 15.25.) Standard direct labor hourly rate Attempts: 1 of 1 used Your answer has been saved. See score details after the due date. Determine the standard direct labor cost per tune-up. (Round answer to 2 decimal places, e.g. 15.25.) Standard direct labor cost per oil change Attempts: 1 of 1 used (d) If a tune-up took 1.5 hours at the standard hourly rate, what was the direct labor quantity variance? Identify whether the variance is favorable or unfavorable. (Round answer to 2 decimal places, e.g. 15.25.) Direct Labor Quantity Variance $