Calculator Three identical units of merchandise were purchased during July, as follows: Date Product T Units Cost July 3 Purchase 1 $30 10 Purchase 1 33 24 Purchase 1 36 Total 3 $99 Average cost per unit $33 Assume one unit sells on July 28 for $47. 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