Calculate cost of goods sold and ending inventory and analyze effect of each method on the financial statements

Washington Company had the following sales and purchases during 2009, its first year of business

January 8

Purchased 125 units at $100 each

February 20

Sold 75 units at $150 each

April 13

Sold 35 units at $150 each

June2 8

Purchased2 35 units at $105 each

August 2

Sold 175 units at $150 each

November 24

Purchased 140 units at $110 each

Required

a. Calculate the ending inventory, the cost of goods sold, and the gross profit for the

December 31, 2009, financial statements under each of the following assumptions:

1. FIFO periodic

2. LIFO periodic

3. Weighted average cost periodic

b. How will the differences between the methods affect the income statement and balance sheet for the year?