Panamint Systems Corporation is estimating activity costs associated with producing disk drives, tapes drive and wire drives. The indirect labor can be traced to four separate activity pools. The budgeted activity cost activity base data by product are provided below. The activity rate for the production cost pool is a. $66.73 per machine hour b. $140.49 per machine hour c. $20.99 per machine hour d $73.76 per machine hour