Tharaldson Corporation makes a product with the following standard costs: Direct materials Direct labor Variable overhead Standard Quantity or Hours 7.0 ounces 0.3 hours Standard Cost Standard Price or Rate $ 3.00 per ounce Per Unit $ 21.00 $ 14.00 per hour $ 4.20 $ 2.70 0.3 hours. $ 9.00 per hour The company reported the following results concerning this product in June. Originally budgeted output Actual output Raw materials used in production 2,400 units 2,900 units 21,000 ounces 21,500 ounces Purchases of raw materials Actual direct labor-hours 550 hours Actual cost of raw materials purchases $ 45,000 $ 12,400 $ 3,200 Actual direct labor cost Actual variable overhead cost 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 labor efficiency variance for June is