The Warnerwood Company uses a perpetual inventory system. It entered the following purchases and sales transactions for March into the system:

Date	Activities	Units Acquired at Cost	Cost per Unit	Units Sold at Retail	Price per unit
March 1	Beginning inventory	100 units	$50
March 5	Purchase	400 units	$55
March 9	Sales			420	$85
March 18	Purchase	120 units	$60
March 25	Purchase	200 units	$62
March 29	Sales			160 units	$95
	Totals	820 units		580 units

Instructions:

Show all of your work in an Excel spreadsheet for the following tasks:

1. Compute the number of units available for sale.

2. Compute the number of units in ending inventory.

3. Compute the cost assigned to ending inventory using (a) FIFO, (b) LIFO, and (c) weighted average. (Round the average cost per unit to 2 decimal places.)

4. Compute the gross profit earned by the company for each of the three costing methods. (Round the average cost per unit to 2 decimal places.)