Marvel Parts, Incorporated, manufactures auto accessories. One of the company's products is a set of seat covers that can be adjusted o 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 1,040 hours each month to produce 2,080 sets of covers. The standard costs associated with this level of production are: During August, the factory worked only 600 direct labch-hours and produced 1,800 sets of covers. The following actual costs were tecorded during the month: At standard, each set of covers should require 2.5 yards of material. All of the materials purchased during the month were used in production. Required: 1. Compute the materiais price and quantity variances for August. 2. Compute the labor rate and efficiency variances for August. 3. Compute the varlable overhead rate and efficiency varlances for August. (Indicate the effect of each variance by selecting "F" for favorable, "U" for unfavorable, and "None" for no effect (l.e., xero (Indicate the effect of each variance by selecting "F" for favorable, " U " for unfavorable, a variance). Input all amounts as positive values.)