Cost Flow Methods The following three identical units of Item Alpha are purchased during April: Item Alpha Units Cost Apr. 2 Purchase 1 $97 14 Purchase 1 100 28 Purchase 1 103 Total 3 $300 Average cost per unit $100 ($300 3 units) Assume that one unit is sold on April 30 for $130. 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