Kirtland Corporation uses a periodic inventory system. At the end of the annual accounting period, December 31, the accounting records for the most popular item in inventory showed the following:

	Transactions	Units	Unit Cost
Beginning inventory, January 1		490	$4.00
Transactions during the year:
a.	Purchase, January 30	390	4.30
b.	Purchase, May 1	550	5.00
c.	Sale ($6 each)	(250)
d.	Sale ($6 each)	(790)

a. Compute the amount of goods available for sale.

b. & c. Compute the amount of ending inventory and cost of goods sold at December 31, under Average cost, First-in, first-out, Last-in, first-out and Specific identification inventory costing methods. For Specific identification, assume that the first sale was selected two-fifths from the beginning inventory and three-fifths from the purchase of January 30. Assume that the second sale was selected from the remainder of the beginning inventory, with the balance from the purchase of May 1.