Blumenthal Manufacturing makes a product with the following standard costs: Standard Quantity or Standard Price or Hours Rate 3.5 pounds $3.00 per pound 0.8 hours $19.00 per hour Direct materials Direct labor Variable overhead 0.8 hours $8.00 per hour In July the company produced 3,800 units using 12,240 pounds of the direct material and 2,300 direct labor-hours. During the month, the company purchased 13,000 pounds of the direct material at a cost of $35,100. The actual direct labor cost was $51,612 and the actual variable overhead cost was $20,148. 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: Select one: a. $-14,060.00 b. $-28,500.00 c. $43,700.00 d $72.200.00