Bulluck Corporation makes a product with the following standard costs: Standard Quantity or Hours Standard Price or Rate Direct materials 4.90 grams $ 2.40 per gram Direct labor 0.90 hours $ 25.00 per hour Variable overhead 0.90 hours $ 3.40 per hour The company reported the following results concerning this product in July. Actual output 4,400 units Raw materials used in production 12,770 grams Actual direct labor-hours 3,800 hours Purchases of raw materials 13,500 grams Actual price of raw materials purchased $ 2.60 per gram Actual direct labor rate $ 12.80 per hour Actual variable overhead rate $ 3.50 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. The variable overhead efficiency variance for July is: Multiple Choice $560 U $544 U $560 F $544 F