Assume that the standard cost to make one finished unit includes 1 hour of direct labor $5.50per hour. During April 11,000 direct labor-hours were worked, 5,250 units of product were manufactured, and total direct labor cost was $63,800. What is the labor rate variance for April? Select one: a 53 300 U b. 58.800 C. 510.000 F d. 52.500 F