Following is some information about a company's product. The company uses a standard cost system. The company applies Variable manufacturing overhead based on direct labor-hours. Inputs Direct materials Direct labor Variable manufacturing overhead Standard Quantity or Hours per Unit of Output Standard Price or Rate 8.4 ounces 0.6 hours 0.6 hours $ 6.50 per ounce $23.80 per hour $ 4.80 per hour The company has reported the following actual results for the product for December: 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 6,000 units 54,760 ounces $299,360 50,410 ounces 3,270 hours $ 80,810 $ 14,953 Required: a. Calculate the materials price variance for December. b. Calculate the materials quantity variance for December. c. Calculate the labor rate variance for December. d. Calculate the labor efficiency variance for December. e. Calculate the variable overhead spending variance for December. f. Calculate the variable overhead efficiency variance for December. (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 c. Labor rate variance d. Labor efficiency variance e. Variable overhead spending variance f. Variable overhead efficiency variance