Three identical units of merchandise were purchased during July, as follows:

Date	Product Basic H	Units	Cost
July 3	Purchase	1	$25
10	Purchase	1	28
24	Purchase	1	31
	Total	3	$84
	Average cost per unit		$28

Assume one unit sells on July 28 for $40.

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.

Line Item Description	Gross Profit	Cost of Goods Sold	Ending Inventory
a. First-in, first-out	$fill in the blank 1	$fill in the blank 2	$fill in the blank 3
b. Last-in, first-out	$fill in the blank 4	$fill in the blank 5	$fill in the blank 6
c. Weighted average	$fill in the blank 7	$fill in the blank 8	$fill in the blank 9