Blue Corp. Expects to work 10,000 direct labor hours this period to meet its production needs. If fixed costs are estimated to be $6,000 and variable costs are estimated to be $4. 80 per direct labor hour, what is the predetermined overhead rate? A. $4. 20 per direct labor hour B. $3. 60 per direct labor hour C. $5. 40 per direct labor hour D. $4. 80 per direct labor hour