Laker Company reported the following January purchases and sales data for its only product. The Company uses a perpetual inventory system. For specific identification, ending inventory consists of 340 units from the January 30 purchase, 5 units from the January 20 purchase, and 15 units from beginning inventory.

Date	Activities	Units Acquired at Cost						Units sold at Retail
January 1	Beginning inventory	210	units	@	$ 13.50	=	$ 2,835
January 10	Sales							160	units	@	$ 22.50
January 20	Purchase	150	units	@	$ 12.50	=	1,875
January 25	Sales							180	units	@	$ 22.50
January 30	Purchase	340	units	@	$ 12.00	=	4,080
	Totals	700	units				$ 8,790	340	units

1. Compute gross profit for the month of January for Laker Company for the four inventory methods.
2. Which method yields the highest gross profit?
3. Does gross profit using weighted average fall between that using FIFO and LIFO?
4. If costs were rising instead of falling, which method would yield the highest gross profit?