10 Simmons Inc. 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 charged with manufacturing overhead of $8,100. What was the amount of direct materials charged to Job 250 assuming the balance in Work in Process inventory is $30,000? Select one alternative: O $ 8,100. 0 $30,000. O $ 9,000. O $12,900