Three identical units of merchandise were purchased during July, as follows: Date Product Basic H July 3 Purchase 10 Purchase 24 Purchase Total Units Cost 1 $22 1 25 1 28 3 $75 $25 Average cost per unit Assume one unit sells on July 28 for $36. Determine the gross profit, cost of goods sold, and ending inventory on July 31 using the (a) first-in, first-out, (b) last-in, first-out, and (c) weighted average cost flow methods. Gross Profit Cost of Goods Sold Ending Inventory a. First-in, first-out b. Last-in, first-out c. Weighted average