Sassafras Inc. has conducted an analysis of overhead costs related to one of its product lines using a traditional costing system (volume-based) and an activity-based costing system. Hollowing are its results: Explain how a difference in the overhead costs between the two systems may have occurred. Altex Co. identifies the following activities that pertain to manufacturing overhead: materials handling, machine set-ups, factory machine maintenance, factory supervision, and quality control. For each activity, identify an appropriate cost driver