The following three identical units of Item Alpha are purchased during April: Item Alpha Units Cost Apr. 2 Purchase 1 $294 14 Purchase 1 298 28 Purchase 1 302 Total 3 $894 Average cost per unit $298 ($894 3 units) Assume that one unit is sold on April 30 for $402. Determine the gross profit for April and ending inventory on April 30 using the (a) first-in, first-out (FIFO); (b) last-in, first-out (LIFO); and (c) weighted average cost methods. Gross Profit Ending Inventory a. First-in, first-out (FIFO) $fill in the blank 1 $fill in the blank 2 b. Last-in, first-out (LIFO) $fill in the blank 3 $fill in the blank 4 c. Weighted average cost $fill in the blank 5 $fill in the blank 6