During May, $60,000 in raw materials (all direct materials) were drawn from inventory and used in production. The company's predetermined overhead rate was $12 per direct labor-hour, and it paid its direct labor workers $15 per hour. A total of 330 hours of direct labor time had been expended on the jobs in the beginning Work in Process inventory account. The ending Work in Process inventory account contained $7,200 of direct materials cost. The Corporation incurred $42,450 of actual manufacturing overhead cost during the month and applied $40,500 in manufacturing overhead cost. The direct materials cost in the May 1 Work in Process inventory account totaled: