22. Aztec Industries produces bread which goes through two operations, mixing and baking, before it is ready to be packaged. Next year's expected costs and activities are shown below. Mixing Baking Total Direct labor hours 400,000 DLH 80,000 DLH 480,000 DLH Machine hours 800,000 MH 8 00,000 MH 1,600,000 MH Overhead costs $600.000 $400,000 $1,000,000 (a). Compute a single plantwide overhead for Aztec based on direct labor hours (round to two decimal places) (b). Compute Aztec's departmental overhead rate for the mixing department based on machine hours (round to two decimal places). (c) Compute Aztec's departmental overhead rate for the baking department based on direct labor hours (round to two decimal places)