Show all work (need help on calculating labor efficiency variance and variable overhead efficiency variance)

Problem 10-9 Comprehensive Variance Analysis [L010-1, LO10-2, LO10-3 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 1,035 hours each month to produce 2,070 sets of covers. The standard costs associated with this level of production are: Per Set of Covers Total Direct materials Direct labor $ 31,878 $15.40 $ 6,21e 3.00 Variable manufacturing overhead (based on direct labor-hours) 4,3472.10 $20.5e During August, the factory worked only 500 direct labor-hours and produced 1,700 sets of covers. The following actual costs were recorded during the month: Per Set Total of Covers Direct materials (5,eee yards,) Direct labor $ 25,5e0 $15.00 5,4403.20 s4,08e2.40 Variable manufacturing overhead $20.60 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: . 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. (Indicate the effect of each variance by selecting "F"for favorable, "U"for unfavorable, and "None" for no effect (i.e., zero variance). Input all amounts as positive values.) Answer is complete but not entirely correct 13,000F 1. Materials price variance Materials quantity variance 12,320 U 2 Labor rate variance 2,440 U Labor efficiency variance 3 Variable overhead rate variance 1,980 U Variable overhead efficiency 5,038 xF variance