Bulluck Corporation makes a product with the following standard costs: Direct materials Direct labor Variable overhead Standard Quantity or Hours 5.50 grams 0.60 hours 0.60 hours Standard Price or Rate $ 3.00 per gram $ 31.00 per hour $ 4.00 per hour The company reported the following results concerning this product in July Actual output 5,000 units Raw materials used in production 13,370 grams Actual direct labor-hours 2,780 hours Purchases of raw materials 14,100 grams Actual price of raw materials purchased $ 3.20 per gram Actual direct labor rate $ 13.40 per hour Actual variable overhead rate $ 4.10 per hour The company applies variable overhead on the basis of direct labor-hours. The direct materials purchases variance is com materials are purchased. The variable overhead efficiency variance for July is: Multiple Choice O $880 F O $902 U $902 F $880 U