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Fortes Inc. has provided the following data concerning one of the products in its standard cost system. Variable manufacturing overhead is applied to products on the basis of direct labor-hours. Inputs Direct materials Direct labor Variable manufacturing overhead Standard Quantity or Hours per Unit of Output 8.6 ounces 0.5 hours 0.5 hours Standard Price or Rate $ 6.70 per ounce $19.70 per hour $ 5.00 per hour The company has reported the following actual results for the product for April: Actual output Raw materials purchased Actual cost of raw materials purchased Raw materials used in production Actual direct labor-hours Actual direct labor cost Actual variable overhead cost 6,200 units 55,850 ounces $309, 640 53,350 ounces 2,910 hours $ 60,700 $ 13,681 Required: a. Compute the materials price variance for April. b. Compute the materials quantity variance for April c. Compute the labor rate variance for April. d. Compute the labor efficiency variance for April . e. Compute the variable overhead rate variance for April. f. Compute the variable overhead efficiency variance for April (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.) a Materials price variance b. Materials quantity variance