During August, the factory worked only 1,050 direct labor-hours and produced 2,400 sets of covers. The following actual costs were recorded during the month: 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. (Do not round intermediate calculations. 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.)