Calculating Activity-Based Costing Overhead Rates Assume that manufacturing overhead for Goldratt Company consisted of the following activities and costs: The following additional data were provided for job 845: (a) Calculate the cost per unit of activity driver for each activity cost category. (b) Calculate the cost of Job 845 using ABC to assign the overhead costs. $ (c) Calculate the cost of Job 845 using the plantwide overhead rate based on machine hours. (Round your answer to the nearest dollar.) $ (d) Calculate the cost of Job 845 using a machine hour departmental overhead rate for the Milling Department ( $42 per hour) and a direct hour overhead rate for the Finishing Department $108 per hour). (Round your answer to the nearest dollar.) $