Valera Corporation makes a product with the following standards for labor and variable overhead: Standard Quantity or Hours Standard Price or Rate Standard Cost Per Unit Direct labor 0.4 hours $ 21.00 per hour $ 8.40 Variable overhead 0.4 hours $ 6.00 per hour $ 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 rate variance for July is: