Using the (a) FIFO, (b) LIFO, and (c) weighted average cost methods, calculate gross profit and ending inventory. The company uses a specific identification inventory cost flow method. On October 21, the company sold 5 units for $90 each.

Date		Units	Cost/Unit	Total Cost
Oct. 2	Purchase	2	$21	$ 42
7	Purchase	2	$22	44
12	Purchase	1	$28	28
18	Purchase	4	$30	120
Total		9		$234