7. The following are the inventory records of the Garret Company:

	Units	Cost	Total
January 1	40	$12	$480
Purchases:
February 10	20	13	260
July 15	40	14	560
November 1	50	15	750
December 10	30	16	480
Available	180		$2,530

Ending inventory consists of 30 units from the July purchase.

Note: The company uses a periodic inventory system.

Required:

Calculate ending inventory and cost of sales, using: (a) FIFO, (b) LIFO, (c) average, and (d) specific identification.