Bramble Inc. uses a perpetual inventory system. Its records show the following for the month of May. Total Cost Unit Date Explanation Units Cost May 1 Inventory 33 $9 May 15 Purchase 25 10 May 18 Sale (45) May 24 Purchase 42 11 Total 55 $297 250 462 $1,009 (a) Calculate the cost of goods sold for May and the ending inventory at May 31 using the FIFO formula. Cost of goods sold $ Ending Inventory $