4 bok nces Tharaldson Corporation makes a product with the following standard costs: Direct materials Direct labor Variable overhead Standard Quantity or Hours 5.8 ounces 0.5 hours 0.5 hours Standard Price or Rate $ 3.00 per ounce Standard Cost Per Unit $ 17.40 $ 6.00 $ 2.50 $ 12.00 per hour $5.00 per hour The company reported the following results concerning this product in June. Originally budgeted output Actual output Raw materials used in production 3,800 units 3,400 units 22,000 ounces Purchases of raw materials Actual direct labor-hours Actual cost of raw materials purchases Actual direct labor cost Actual variable overhead cost 22,500 ounces 520 hours $ 42,500 $ 13,800 $ 3,900 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 rate variance for June is