Novus 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 follows: Engine parts 51,013,800 Shop direct labor 740,000 Shop and repair equipment depreciation 46,700 Shop supervisor salaries 129,900 Shop property taxs 23,600 Shop supplies 18,100 Advertising expense 20,300 Administrative office salaries 87,200 Administrative office depreciation expense 11,200 Total costs and expenses $2,090,800 The average shop direct labor rate is $20 per hour. Determine the predetermined shop overhead rate per direct labor hour. Round your answer to the nearest cent. 9.11 x per direct labor hour