Concord Inc. uses a periodic inventory system. Its records show the following for the month of May, in which 84 units were sold. Date Explanation Units Unit Cost Total Cost May 1 Inventory 28 $9 $252 May 15 Purchase 23 10 230 May 24 Purchase 39 11 429 Total 90 $911 (a) Calculate the Cost of goods sold and the ending inventory at May 31 using the FIFO formula. Cost of goods sold $ Ending inventory $ eTextbook and Media Save for Later Attempts: 0 of 15 used Submit Answer