plz answer this question quick:). (will like up)

Panamint Systems Corporation is estimating activity costs associated with producing disk drives, tapes drives, and wire drives. The indirect labor can be traced to four separate activity pools. The budgeted activity cost and activity base data by product are provided below. Procurement Scheduling Activity Cost Activity Base $397,400 Number of purchase orders 216,900 Number of production orders 446,000 Number of moves 730,500 Number of engineering changes 1,574,300 Machine hours Materials handling Product development Production 2 Number of Purchase Orders Number of Production Orders Number of Moves Number of Engineering Changes Machine Hours Number of Units 1,340 14 1,800 2,000 770 5 8,200 3,600 4,400 20 11,000 2,200 Disk drives 4,010 370 Tape drives 2,400 185 Wire drives 13,000 770 The activity rate for the production cost pool is Oa. $143.48 per machine hour Ob. $74.97 per machine hour Oc. $68.51 per machine hour Od. $20.47 per machine hour