Campbell has a standard of 2 direct labor hours per unit. The standard wage rate of each worker is $22.50 per hour. In July, Campbell produced 4,760 units and paid workers $189,600 for a total of 8,900 direct labor hours. Compute the direct labor efficiency variance. Multiple Choice $10.650 unfavorable $13.950 favorable D 510.650 favorable $24.600 favorable