Concord's purchases of WhiteOut snowboards during September. During the same month, 120 White Out snowboards were sold at enthusiasts. Presented below is information relating to $173 each, Concord uses a periodic inventory system. Date Explanation Units Unit Cost Total Cost Sept. 1 Sept. 12 Inventory 26 $101 $2,626 Purchases 43 105 4.515 Sept. 19 Purchases 22 110 2,420 Sept. 26 Purchases 52 113 5,876 Totals 143 $15,437 (a) (b) (c) What is gross profit under each method? FIFO Gross Profit LIFO