REI sells snowboards. Assume the following information relates to REI's purchases of snowboards during September, During the same month, 100 snowboards were sold. REI uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Sept. 12 Inventory 10 $100 $1,000 Purchases 45 103 4,635 Sept. 19 Purchases 50 104 5,200 Sept 26 Purchases 20 105 2,100 Totals: 125 $12.935 (a) ype here to search ET C 1243 PM 58