Can someone please help me to check it. ( Those have incorrect answers)

Exercise 5-3 (Static) Periodic: Inventory costing methods LO P1

The following information applies to the questions displayed below.]

Laker Company reported the following January purchases and sales data for its only product. The Company uses a periodic inventory system. For specific identification, ending inventory consists of 200 units, where 180 are from the January 30 purchase, 5 are from the January 20 purchase, and 15 are from beginning inventory.

Date	Activities	Units Acquired at Cost						Units sold at Retail
January 1	Beginning inventory	140	units	@	$ 6.00	=	$ 840
January 10	Sales							100	units	@	$ 15
January 20	Purchase	60	units	@	$ 5.00	=	300
January 25	Sales							80	units	@	$ 15
January 30	Purchase	180	units	@	$ 4.50	=	810
	Totals	380	units				$ 1,950	180	units

b) Weighted average - Periodic	Cost of Goods Available for Sale			Cost of Goods Sold			Ending Inventory
	# of units	Average Cost per unit	Cost of Goods Available for Sale	# of units sold	Average Cost per Unit	Cost of Goods Sold	# of units in ending inventory	Average Cost per unit	Ending Inventory
Beginning inventory	140		840
Purchases:
January 20	60		300
January 30	180		810
Total	380	$5.00selected answer incorrect	$1,950	0selected answer incorrect	$5.00selected answer incorrect	$0	440selected answer incorrect	$5.00selected answer incorrect	$2,200

c) Periodic FIFO	Cost of Goods Available for Sale			Cost of Goods Sold			Ending Inventory
	# of units	Cost per unit	Cost of Goods Available for Sale	# of units sold	Cost per unit	Cost of Goods Sold	# of units in ending inventory	Cost per unit	Ending Inventory
Beginning inventory	140	6.00	$840	0selected answer incorrect			140selected answer incorrect	$6.00	$840
Purchases:
January 20	60	5.00	300	0selected answer incorrect			100selected answer incorrect	$5.00	500
January 30	180	4.50	810	0selected answer correct			200selected answer incorrect	$4.50	900
Total	380		$1,950	0		$0	440		$2,240

d) Periodic LIFO	Cost of Goods Available for Sale			Cost of Goods Sold			Ending Inventory
	# of units	Cost per unit	Cost of Goods Available for Sale	# of units sold	Cost per unit	Cost of Goods Sold	# of units in ending inventory	Cost per unit	Ending Inventory
Beginning inventory	140	6.00	$840	0selected answer correct			140selected answer correct	$6.00	$840
Purchases:
January 20	60	5.00	300	0selected answer correct			100selected answer incorrect	$5.00	500
January 30	180	4.50	810	0selected answer incorrect			200selected answer incorrect	$4.50	900
Total	380		$1,950	0		$0	440		$2,240