Juhasz Corporation makes a product with the following standards for direct labor and variable overhead: Standard Quantity or Hours Standard Price or Rate Direct labor 0.50 hours $33.00 per hour Variable overhead 0.50 hours $ 5.30 per hour In August the company produced 9,200 units using 4,720 direct labor-hours. The actual variable overhead cost was $23,600. The company applies variable overhead on the basis of direct labor-hours. The variable overhead efficiency variance for August is: Multiple Choice $636 U $600 U $636 F $600 F