Exercise 6-4 Delmott sells a snowboard, Xpert, that is popular with snowboard enthusiasts. Below is information relating to Delmotts purchases of Xpert snowboards during September. During the same month, 102 Xpert snowboards were sold. Delmott uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Inventory 12 $100 $ 1,200 Sept. 12 Purchases 45 103 4,635 Sept. 19 Purchases 50 104 5,200 Sept. 26 Purchases 20 105 2,100 Totals 127 $13,135