manufacturing overhead costs in the upcoming year and will use 8,000 machine hours. View additional information. Requirements 1. Calculate the cost of Job 350 using the traditional plantwide manufacturing overhead rate based on machine hours. 2. Calculate the cost of Job 350 using activity-based costing. 3. If you were a manager, which cost estimate would provide you more useful information? How might you use this information? Additional information Up to this point, hazardous waste disposal fees have been absorbed into the plantwide manufacturing overhead rate and allocated to all products as part of the manufacturing overhead process. Recently, the company has been experiencing significantly increased waste disposal fees for hazardous waste generated by certain products, and as a result, profit margins on all products have been negatively impacted. Company management wants to implement an activity-based costing system so that managers know the cost of each product, including its hazardous waste disposal costs. Expected usage and costs for manufacturing overhead activities for the upcoming year are as follows