Ferris Company began 2018 with 9,000 units of its principal product. The cost of each unit is $4. Merchandise transactions for the month of January 2018 are as follows:

Purchases:

January 10: 6,000 units at $5 total cost $30,000

January 18: 9,000 units at $6 total cost $54,000

Totals: 15,000 units $84,000

*Includes purchase price and cost of freight.

Sales:

January 5: 5,000 units

January 12: 3,000 units

January 20: 6,000 units

Total: 14,000 units

10,000 units were on hand at the end of the month.

Calculate January's ending inventory and cost of goods sold for the month using each of the following alternatives:

1.FIFO, periodic system. (completed)

2.LIFO, periodic system. (help)

3.LIFO, perpetual system. (help)

4.Average cost, periodic system. (completed)

5.Average cost, perpetual system. (help)