Brief Exercise 15-6 Marquis Company estimates that annual manufacturing overhead costs will be $855,000. Estimated annual operating activity bases are direct labor cost $489,000, direct labor hours 51,000, and machine hours 110,000 Compute the predetermined overhead rate for each activity base. (Round answers to 2 decimal places, e.g. 10.50.) Overhead rate per direct labor cost Overhead rate per direct labor hour s Overhead rate per machine hour