The beginning inventory balance of item B on August 1 and the purchases of the item during the month of August were as follows: August 1 beginning inventory 800 units @ $10.00 = $ 8,000

9 purchase 700 units @ $10.50 = $ 7,350

11 purchase 500 units @ $ 11.00 = $ 5,500

23 purchase 200 units @ $ 11.25 = $ 2,250

31 total 2,200 $ 23,100

At August 31, the ending inventory consisted of 900 units. Determine the ending inventory and cost of goods sold for August based on each of the following methods of inventory valuation. Assume a period inventory system.

a. Last- in, first-out Grading Component Element 1

b. First-in, first-out Grading Component Element 2

c. Average cost Grading Component Element 3