Bulluck Corporation makes a product with the following standard costs:

Standard Quantity or Hours Standard Price or Rate

Direct materials 5.50 grams $ 3.00 per gram

Direct labor 0.60 hours $ 31.00 per hour

Variable overhead 0.60 hours $ 4.00 per hour

The company reported the following results concerning this product in July.

Actual output 5,000 units

Raw materials used in production 13,370 grams

Actual direct labor-hours 2,780 hours

Purchases of raw materials 14,100 grams

Actual price of raw materials purchased $ 3.20 per gram

Actual direct labor rate $ 13.40 per hour

Actual variable overhead rate $ 4.10 per hour

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 July is: