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?$

Group of answer choices

$ $9,000.$

$$30,000.$

$ $8,100.$

$$12,900.$