The college campus bookstore uses a periodic inventory system. The bookstore purchases 400 copies of a textbook at $70 each in June, 950 copies in August at $72 each, and 630 copies in December at $75 each. The bookstore sold 1,865 copies of the textbook during the year. Calculate the company's ending inventory and cost of goods sold using the each of following inventory costing methods.

a. FIFO

Cost of Goods Sold
Ending Inventory

b. LIFO

Cost of Goods Sold
Ending Inventory

c. Weighted Average cost method