Street Runner Engine Shop uses a job order cost system to determine the cost of performing engine repair work. Estimated costs and expenses for the coming period are as follows: Engine parts $740,000
Shop direct labor 500,000
Shop and repair equipment depreciation 40,000
Shop supervisor salaries 133,000
Shop property taxes 22,000
Shop supplies 10,000
Advertising expense 20,000
Administrative office salaries 71,400
Administrative office depreciation expense 6,000
Total costs and expenses $1,542,400
The average shop direct labor rate is $20 per hour.
Determine the predetermined shop overhead rate per direct labor hour.