Periodic inventory by three methods; cost of goods sold

The units of an item available for sale during the year were as follows:

Jan. 1	Inventory	30 units at $120
Mar. 10	Purchase	50 units at $132
Aug. 30	Purchase	10 units at $138
Dec. 12	Purchase	110 units at $140

There are 40 units of the item in the physical inventory at December 31. The periodic inventory system is used.

Determine the ending inventory cost and the cost of goods sold by three methods. Round interim calculations to one decimal and final answers to the nearest whole dollar.

Cost of Ending Inventory and Cost of Goods Sold

Inventory Method	Ending Inventory	Cost of Goods Sold
First-in, first-out (FIFO)
Last-in, first-out (LIFO)
Weighted average cost