Before we prepare the comparative statement, calculate the value of ending inventory under each of the three different methods. Begin by computing the ending inventory value using FIFO (First-in, First-out). (Leave any unused cells blank. Do not enter a "O" for any zero-balances.) Inventory Layer Beginning inventory (December 31, 20X7) Purchase from February 10, 20X8 Purchase from May 9, 20x8 Purchase from October 21, 20X8 Ending inventory -FIFO Units Unit cost Total cost