I'm having trouble understanding what to do, please help

[The following information applies to the questions displayed below.] Tree Seedlings has the following current-year purchases and sales for its only product.

Date	Activities	Units Acquired at Cost					Units Sold at Retail
January 1	Beginning inventory	100	units	@ $2	=	$ 200
January 3	Sales						86	units	@ $ 8
February 14	Purchase	138	units	@ $3	=	$ 414
February 15	Sales						120	units	@ $ 8
June 30	Purchase	150	units	@ $4	=	$ 600
November 6	Sales						122	units	@ $ 8
November 19	Purchase	44	units	@ $5	=	$ 220
	Totals	432	units			$ 1,434	328	units

The company uses a periodic inventory system. a. Determine the costs assigned to ending inventory and to cost of goods sold using FIFO. b. Determine the costs assigned to ending inventory and to cost of goods sold using LIFO. c. Compute the gross profit for each method.

A).

Determine the costs assigned to ending inventory and to cost of goods sold using FIFO.

Periodic Inventory System	Ending Inventory	Cost of Goods Sold
FIFO

B).

Determine the costs assigned to ending inventory and to cost of goods sold using LIFO.

Periodic Inventory System	Ending Inventory	Cost of Goods Sold
LIFO

C).

Compute the gross profit for each method.

	FIFO	LIFO
Sales
Cost of goods sold
Gross profit	$	$