Colfax company incurred production labor costs of $5,400 in Feb(payable in march) for work requiring 1,100 standard hours, at a standard rate of $15.00 per hour: 1,200 actual direct labor hours were worked. Based on this information, which one of the following would be included in the journal entry to record labor costs: A. $16,500 credit to work in process inventory. B. $1,500 credit to labor efficency variance. C. $16,200 crdit to wages payable. D. $1,500 credit to labor rate variance?