Cost flow methods The following three identical units of Item P401C are purchased during April: Assume that one unit is sold on April 27 for $367. 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 method. Cost flow methods The following three identical units of Item P401C are purchased during April: Assume that one unit is sold on April 27 for $367. 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 method