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
Jan.	1	Beginning inventory	140	units	@	$	6.00	=	$	840
Jan.	10	Sales										100	units	@	$	15
Jan.	20	Purchase	60	units	@	$	5.00	=		300
Jan.	25	Sales										80	units	@	$	15
Jan.	30	Purchase	180	units	@	$	4.50	=		810
		Totals	380	units					$	1,950		180	units

Compute gross profit for the month of January for Laker Company for the four inventory methods.

Which method yields the highest gross profit?

Does gross profit using weighted average fall between that using FIFO and LIFO?

If costs were rising instead of falling, which method would yield the highest gross profit?