Ruth's Boards sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Information relating to Ruth's purchases of Xpert snowboards during September is shown below. During the same month, 120 Xpert snowboards were sold. Ruth's uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 27 $96 $2,592 Sept. 12 Purchases 45 101 4,545 ept. 19 Purchases 20 20 103 2,060 H 23