TB MC Qu. 10-37 (Static) ABC Electronics Corporation uses a standard ... ABC Corporation uses a standard cost system for the production of its water ski radios. The direct labor standard for each radio is 0.9 hours. The standard direct labor cost per hour is $7.20. During the month of August, ABC's water ski radio production used 6,600 direct labor-hours at a total direct labor cost of $48,708. This resulted in production of 6,900 water ski radios for August. What is ABC's labor rate variance for August