At a lump-sum cost of $75000, Cullumber Company recently purchased the following items for resale: Item No. of Items Purchased Resale Price Per Unit M 5200 $4.35 N 2600 13.20 O 7200 7.20 The appropriate cost per unit of inventory is: M N o $3.00 $9.10 $4.96 $5.00 $5.00 $5.00 $4.35 $13.20 $7.20 $3.68 $11.15 $6.08