Bulluck Corporation makes a product with the following standard costs: Standard Quantity or HoursStandard Price or Rate Direct materials 3.5grams$1.00per gram Direct labor 0.7hours$11.00per hour Variable overhead 0.7hours$2.00per hour The company reported the following results concerning this product in July. Actual output 3,000units Raw materials used in production 11,370grams Actual direct labor-hours 1,910hours Purchases of raw materials 12,100grams Actual price of raw materials purchased$1.20per gram Actual direct labor rate$11.40per hour Actual variable overhead rate$2.10per 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 labor efficiency variance for July is: