Three identical units of merchandise were purchased during July, as follows: Date Product T Units Cost July 3 Purchase 1 $16 10 Purchase 1 19 24 Purchase 1 22 Total 3 $57 Average cost per unit $19 Assume one unit sells on July 28 for $29. Determine the gross profit, cost of goods sold, and ending inventory on July 31 using (a) first-in, first-out, (b) last-in, first-out, and (c) average cost flow methods. Gross Profit Cost of Goods Sold Ending Inventory a. First-in, first-out b. Last-in, first-out $ c. Average