Marvel Parts, Inc., manufactures auto accessories. One of the company's products is a set of seat covers that can be adjusted to fit nearly any small car. The company has a standard cost system in use for all of its products. According to the standards that have been set for the seat covers, the factory should work 1,010 hours each month to produce 2,020 sets of covers. The standard costs associated with this level of production are Per Set Direct materials Direct labor Variable manufacturing overhead Total of Covers $ 7,070 $ 3,030 $ 36,360 $18.00 3.50 1.50 $23.00 (based on direct labor-hours) During August, the factory worked only 1,080 direct labor-hours and produced 2,700 sets of covers. The following actual costs were recorded during the month: Per Set Total of Covers Direct materials (8,100 yards) Direct labor $46,980 $17.40 3.70 1.70 $22.80 $ 9,990 $ 4,590 Variable manufacturing overhead At standard, each set of covers should require 2.0 yards of material. All of the materials purchased during the month were used in production Required: 1. Compute the materials price and quantity variances for August. 2. Compute the labor rate and efficiency variances for August. 3. Compute the variable overhead rate and efficiency variances for August