Tharaldson Corporation makes a product with the following standard costs: Standard Quantity or Hours 6.9ounces Direct materials Standard Price or Rate Standard Cost Per Unit 2.00per ounce $ 13.80 Direct labor 0.4hours $ 13.00per hour 5 5.20 Variable overhead 0.4hours $ 8.00per hour $ 3.20 The company reported the following results concerning this product in June. Originally budgeted output Actual output Raw materials used in production 2300 units 2800 units 20.500 ounces Actual direct labor-hours Actual cost of raw materials purchases Actual direct labor cost Actual variable overhead cost $ $ 540 hours 42.000 12,300 3150 The labor efficiency variance for June is: $4940F $4940 U $7540 0 O $7540 F