A department has budgeted monthly manufacturing overhead cost of $270,000 plus $3 per direct labor hour. If a flexible budget report reflects $522,000 for total budgeted manufacturing cost for the month, the actual level of activity achieved during the month was a) 264,000 direct labor hours. b) 174,000 direct labor hours. c) Cannot be determined from the information provided. d) 84,000 direct labor hours