Please explain the correct approach for solving this general accounting question.

Orion Systems Inc. received Job Q9F from a customer on July 12. During the month of July, the company requisitioned $3,000 of direct materials and used $5,000 of direct labor. The job was not completed by the end of July. In August, the job required additional direct materials of $4,500 and additional direct labor of $7,500 to finish. The company applies overhead at the end of each month at a rate of 150% of the direct labor cost incurred. What is the total cost of Job Q9F when it is completed in August