Can you show me the correct steps to find the Variable Overhead Rate Variance? I would like to understand what I did wrong.

5 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 1,055 hours each month to produce 2,110 sets of covers. The standard costs associated with this level of production are: 23/25 Per Set points awarded Direct materials Total of Covers Direct labor $ 51, 273 $24 . 30 Scored Variable manufacturing overhead (based $ 10, 550 5.00 on direct labor-hours) $ 4, 853 2 . 30 $31. 60 Book During August, the factory worked only 1,000 direct labor-hours and produced 2,100 sets of covers. The following actual costs were recorded during the month: Print Per Set Total Direct materials (6, 800 yards) of Covers Direct labor $ 49 , 980 $23 . 80 Variable manufacturing overhead $ 10, 920 5 . 20 $ 5, 460 2 . 60 $31. 60 At standard, each set of covers should require 3.0 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. (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.) 1 . Materials price variance 5, 100 F O Materials quantity variance 4,050 U 2 Labor rate variance 920 U O Labor efficiency variance 500 F O 3 Variable overhead rate variance 140 U O Variable overhead efficiency variance 230 F