Current Attempt in Progress Vaughn Manufacturing applies overhead to production at a predetermined rate of 90% based on direct labor cost. Job No. 250 , the only job still in process at the end of August, has been increased with manufacturing overhead of $9000. What was the amount of direct materials added to Job 250 assuming the balance in Work in Process inventory is $55000 ? $55000. $9000. $10000. $36000