Hamilton Company uses a periodic inventory system. At the end of the annual accounting period, December 31 of the current year, the accounting records provided the following information for product 1:

	Units	Unit Cost
Inventory, December 31, prior year	1,950	$ 6
For the current year:
Purchase, March 21	6,180	5
Purchase, August 1	4,050	3
Inventory, December 31, current year	3,000

Required:

Compute ending inventory and cost of goods sold under FIFO, LIFO, and average cost inventory costing methods.

if you could explain, thank you