Carlson Auto Dealers Inc. sells a handmade automobile as its only product. Each automobile is identical; however, they can be distinguished by their unique ID number. At the beginning of 2021, Carlson had three cars in inventory, as follows:

Car ID	Cost
203	$	54,000
207		54,000
210		57,000

During 2021, each of the three autos sold for $84,000. Additional purchases (listed in chronological order) and sales for the year were as follows:

Car ID	Cost			Selling Price
211	$	54,000		$	84,000
212		54,000			87,000
213		55,500		not sold
214		57,000			90,000
215		60,000			94,500
216		61,500		not sold
217		63,000			99,000
218		63,300			100,500
219		66,000		not sold

a) Calculate ending inventory and cost of goods sold assuming FIFO and a periodic inventory system.

b) Calculate ending inventory and cost of goods sold assuming the average cost method and a periodic inventory system.