Musket Oil performs oil changes. The standard wage rate for oil change technicians is $10 per hour. By analyzing its past records of time spent on oil changes, the company has developed a standard of 12 minutes (or 0.20 hours) per oil change. In July, 1.700 oil changes were performed at Musket Oil. Oil change technicians worked a total of 315 direct labor hours at an average rate of $21 per hour. Read the requirements. favorable (F) or unfavorable (U). Enter the currency amount in the formula to the nearest cent, then round the final variance amount to the noarest whole dollar. Abbreviations used: DL= Diroct labor.) Requirement 2. Calculate the direct labor efficiency variance. Dotermine the formula for the efficiency variance, then compute the efficiency variance for the direct labor, (Ever the result as a ponitive number. Label the variance as tavorable (F) or unfavorable (U). Enter the currency amount in the formula to the nearest cont, then round the final variance amount to the nearest whole dollar. Abbreviations usod: DL = Direct labor)