Marvel Parts, Incorporated, manufactures auto accessories. One of the company's products is a set of seat covers that can be adjuste 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 1,030 hours each month to produce 2,060 sets of covers. The standard costs associated with this level of production are: During August, the factory worked only 640 direct labor-hours and produced 1,600 sets of covers. The following actual costs were recorded during the month: At standard, each set of covers should require 25 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. (Do not round Intermedlate calculations. Indicate the effect of each varience by selecting "F" for favorable, "U" for unfovorable. and "None" for no effect (i.e., zero varlance). Input all amounts as positive values.)