Maintenance workers clean the factory after production finishes at the end of each day. If $32,000 of Setup is used as an activity cost pool, which of the following would be used as a cost driver? If $202,000 of Assembly is used as an activity cost pool, which of the following would be used as a cost driver? If $42,000 of Inspection is used as an activity cost pool, which of the following would be used as a cost driver? If $12,000 of Maintenance is used as an activity cost pool, which of the following would be used as a cost driver?