The beginning inventory for Midnight Supplies and data on purchases and sales for a three month period are as follows:

Date		Transaction	Number of Units	Per Unit	Total
Jan.	1	Inventory	7,500	$ 75.00	$ 562,500
	10	Purchase	22,500	85.00	1,912,500
	28	Sale	11,250	150.00	1,687,500
	30	Sale	3,750	150.00	562,500
Feb.	5	Sale	1,500	150.00	225,000
	10	Purchase	54,000	87.50	4,725,000
	16	Sale	27,000	160.00	4,320,000
	28	Sale	25,500	160.00	4,080,000
Mar.	5	Purchase	45,000	89.50	4,027,500
	14	Sale	30,000	160.00	4,800,000
	25	Purchase	7,500	90.00	675,000
	30	Sale	26,250	160.00	4,200,000

1. Determine the inventory on March 31 and the cost of goods sold for the three-month period, using the first-in, first-out method and the periodic inventory system.

Inventory, March 31:
Cost of goods sold:

2. Determine the inventory on March 31 and the cost of goods sold for the three-month period, using the last-in, first-out method and the periodic inventory system.

Inventory, March 31:
Cost of goods sold:

3. Determine the inventory on March 31 and the cost of goods sold for the three-month period, using the weighted average cost method and the periodic inventory system. Round the weighted average unit cost to the nearest cent.

Inventory, March 31:
Cost of goods sold:

4. Compare the gross profit and the March 31 inventories, using the following column headings.

1		FIFO	LIFO	Weighted Average
2	Sales
3	Cost of goods sold
4	Gross profit
5
6	Inventory, March 31