4. Bulluck Corporation makes a product with the following standard costs: Direct materials Direct labor Variable overhead Standard Quantity or Hours 3.5 grams 0.7 hours 0.7 hours Standard Price or Rate $ 1.00 per gram $ 11.00 per hour $ 2.00 per hour The company reported the following results concerning this product in July. Actual output Raw materials used in production Actual direct labor-hours Purchases of raw materials Actual price of raw materials purchased Actual direct labor rate Actual variable overhead rate 3,000 units 11,370 grams 1,910 hours 12,100 grams 1.20 per gram | 11.40 per hour 2.10 per hour $ The company applies variable overhead on the basis of direct labor-hours. The direct materials purchases variance is computed when the materials are purchased. a. Compute the materials price variance for July. b. Compute the materials quantity variance for July. c. Compute the labor rate variance for July. d. Compute the labor efficiency variance for July. e. Compute the variable overhead rate variance for July. f. Compute the variable overhead efficiency variance for July