Express Distribution markets CDs of the performing artist Fishe. At the beginning of October, Express had in beginning inventory 2,000 of Fishes CDs with a unit cost of $7. During October, Express made the following purchases of Fishes CDs.

Oct. 3		2,500	@	$8		Oct. 19		3,000	@	$10
Oct. 9		3,500	@	$9		Oct. 25		4,000	@	$11

During October, 10,900 units were sold. Express uses a periodic inventory system.

I need help figuring out how to use the FIFO method for cost of goods sold and the ending inventory.