January 1	Beginning Inventory	20	$ 70	$ 1,400
March 28	Purchase	30	76	2,280
August 22	Purchase	40	80	3,200
October 14	Purchase	45	86	3,870
Goods Available for Sale		135		$ 10,750

The company sold 45 units on May 1 and 40 units on October 28. Required: Calculate the company's ending inventory and cost of goods sold using the each of following inventory costing methods.

1. FIFO
2. LIFO
3. Weighted Average