Altex Inc. manufactures two products: car wheels and truck wheels. To determine the amount of overhead to assign to each product line, the controller, Robert Hermann, has developed the following information. Estimated wheels produced Direct labor hours per wheel Car Truck 37,000 10,000 1 3 Total estimated overhead costs for the two product lines are $777,200. (a1) Calculate overhead rate. (Round answer to 2 decimal places, eg. 12.25) Overhead rate $ per direct labor hour