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. Car Truck Estimated wheels produced 42,000 15,000 Direct labor hours per wheel 1 3 Total estimated overhead costs for the two product lines are $ 835,200. (a1) Calculate overhead rate. (Round answer to 2 decimal places, e.g. 12.25.) Overhead rate $ per direct labor hour