Simmons Inc. applies overhead to production at a predetermined rate of 13.50 per direct labor hour. Job No. 250, the only job still in process at the end of August, has been charged with manufacturing overhead of $8,100. Job 250 used 500 machine hours. The companys direct labor rate per hour is $15. What was the amount of direct materials charged to Job 250 if the balance in Work in Process Inventory is $30,000? (PLEASE SHOW SOLVING STEPS, the solution should be $12,900)