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	20 units at $1,800
May 15	Purchase	29 units at $1,950
Aug. 7	Purchase	13 units at $2,040
Nov. 20	Purchase	15 units at $2,100

There are 20 units of the item in the A detailed listing of merchandise on hand.physical inventory at December 31.

Determine the cost of ending inventory and the cost of goods sold by three methods, presenting your answers in the following form:

Round your intermediate calculations and final answers to the nearest dollar.

	Cost
Inventory Method	Ending Inventory	Cost of Goods Sold
a. A method of inventory costing based on the assumption that the costs of merchandise sold should be charged against revenue in the order in which the costs were incurred.First-in, first-out method	$	$
b. A method of inventory costing based on the assumption that the most recent merchandise inventory costs should be charged against revenue.Last-in, first-out method	$	$
c. Weighted average cost method	$	$