Valera Corporation makes a product with the following standards for labor and variable overhead: Direct labor Variable overhead Standard Quantity or Hours 0.4 hours 2.4 hours Standard Price or Rate $21.ee per hour $ 6.00 per hour Standard Cost Per Unit $8.40 $2.40 The company budgeted for production of 5,300 units in July, but actual production was 5,400 units. The company used 2,130 direct labor-hours to produce this output. The actual variable overhead rate was $6.10 per hour. The company applies variable overhead on the basis of direct labor-hours. The variable overhead efficiency variance for July is: Multiple Choice