Tharaldson Corporation makes a product with the following standard costs: Standard Quantity or Hours Standard Cost Direct materials Direct labor Variable overhead 7.0 ounces 0.3 hours 0.3 hours Standard Price or Rate: Per Unit $ 3.00 per ounce $ 21.00 $ 14.00 per hour $ 4.20 $ 1.80 $ 6.00 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 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 550 hours. $ 45,000 $ 12,400 $ 3,450 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 rate variance for June is