Don't give me the publisher's answer

E10-15 Predetermined factory overhead rate Ace Engine Shop uses a job order cost system to determine the cost of performin repair work. Estimated costs and expenses for the coming period are as follows: g Engine parts Shop direct labor Shop and repair equipment depreciation Shop supervisor salaries Shop property taxes Shop supplies Advertising expense Administrative office salaries $325,000 296,000 18,000 110,000 20,500 7,500 30,000 75,000 8,000 $890,000 Administrative office depreciation expense Total costs and expenses The average shop direct labor rate is $18.50 per hour. Determine the predetermined overhead rate per direct labor hour. shop