Exercise 8.7 Costing Inventory in a Periodic System (LO8-4)

Rogers Products uses a periodic inventory system. The companys records show the beginning inventory of PH4 oil filters on January 1 and the purchases of this item during the current year to be as follows:

Jan. 1	Beginning inventory	14 units	@ $3.00	$	42.00
Feb. 23	Purchase	17 units	@ $3.50		59.50
Apr. 20	Purchase	27 units	@ $3.80		102.60
May 4	Purchase	38 units	@ $4.00		152.00
Nov. 30	Purchase	18 units	@ $5.00		90.00
	Totals	114 units		$	446.10

A physical count indicates 22 units in inventory at year-end.

Determine the cost of the ending inventory on the basis of each of the following methods of inventory valuation. (Remember to use periodic inventory costing procedures.) (Round your intermediate and final answers to 2 decimal places.)

a.	Average cost.
b.	FIFO.
c.	LIFO.

I understand the average cost, but I'm having a really hard time understanding FIFO and LIFO.