George Bicycle Shop has the following transactions related to its top-selling Mongoose mountain bike for the month of March. George Bicycle Shop uses a periodic inventory system.

Date	Transactions	Units	Unit Cost	Total Cost
March 1	Beginning inventory	20	$160	$3,200
March 5	Sale ($220 each)	15
March 9	Purchase	10	180	1,800
March 17	Sale ($270 each)	8
March 22	Purchase	10	190	1,900
March 27	Sale ($295 each)	12
March 30	Purchase	8	210	1,680
				$8,580

For the specific identification method, the March 5 sale consists of bikes from beginning inventory, the March 17 sale consists of bikes from the March 9 purchase, and the March 27 sale consists of four bikes from beginning inventory and eight bikes from the March 22 purchase.

Required:

1. Calculate ending inventory and cost of goods sold at March 31, using the specific identification method. 2. Using FIFO, calculate ending inventory and cost of goods sold at March 31. 3. Using LIFO, calculate ending inventory and cost of goods sold at March 31. 4. Using weighted-average cost, calculate ending inventory and cost of goods sold at March 31. 5. Calculate sales revenue and gross profit under each of the four methods. 6. Comparing FIFO and LIFO, which one provides the more meaningful measure of ending inventory? 7. If George Bicycle Shop chooses to report inventory using LIFO instead of FIFO, record the LIFO adjustment.