Ferris Company began 2018 with 4,000 units of its principal product. The cost of each unit is $6. Merchandise transactions for the month of January 2018 are as follows:

	Purchases
Date of Purchase	Units		Unit Cost*			Total Cost
Jan. 10	3,000		$	7			$	21,000
Jan. 18	4,000			8				32,000
Totals	7,000							53,000

*Includes purchase price and cost of freight.

Sales
Date of Sale	Units
Jan. 5	2,000
Jan. 12	1,000
Jan. 20	3,000
Total	6,000

5,000 units were on hand at the end of the month. Required: Calculate January's ending inventory and cost of goods sold for the month using each of the following alternatives: 1. FIFO, periodic system. 2. LIFO, periodic system. 3. LIFO, perpetual system. 4. Average cost, periodic system. 5. Average cost, perpetual system.