Three identical units of merchandise were purchased during July, as follows: Date Product T Units Cost July 3 Purchase 1 $30.00 10 Purchase 1 33.00 24 Purchase 1 36.00 Total 3 $99.00 Average cost per unit $33.00 Assume one unit sells on July 28 for $47.00 Determine the gross profit, cost of goads sold, and ending inventory on July 31 using (a) first-in, first-out (b) last-in, first-out, and (c) average cost flow methods. Cost of Goods Sold Ending Inventory a) First-in, first-out Gross Profit b) Last-in, first-out c) Average