Tharaldson Corporation makes a product with the following standard costs: Direct materials Direct labor Variable overhead Standard Quantity or Hours 6.5 ounces Standard Price or Rate $2.00 per ounce Standard Cost Per Unit $ 13.00 0.2 hours $ 23.00 per hour $ 4.60 0.2 hours $ 6.00 per hour $ 1.20 The company reported the following results concerning this product in June. Originally budgeted output Actual output Raw materials used in production 2,700 units 2,800 units 19,380 ounces Purchases of raw materials Actual direct labor-hours Actual cost of raw materials purchases Actual direct labor cost Actual variable overhead cost 21,400 ounces 500 hours $ 40,660 $ 12,050 $ 3,100 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 efficiency variance for June is