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 630 hours each month to produce 2,100 sets of covers. The standard costs associated with this level of production are: Per Set Total of Covers 38,640 $18.40 Direct materials 6,300 3.000 Direct labor Variable manufacturing overhead 3,150 1.50 (based on direct labor-hours) $22.90 During August, the factory worked only 500 direct labor-hours and produced 2,000 sets of covers. The following actual costs were recorded during the month: Per Set Total of Covers 36,000 $18.00 Direct materials (5,000 yards) 6,400 3.20 Direct labor 4,400 2.20 Variable manufacturing overhead $23.40 At standard, each set of covers should require 2.30 yards of material. All of the materials purchased during the month were used in production