I need help with the LIFO and FIFO methods please

Required information

[The following information applies to the questions displayed below.] Laker Company reported the following January purchases and sales data for its only product.

Date		Activities	Units Acquired at Cost								Units sold at Retail
Jan.	1	Beginning inventory	160	units	@	$	8.50	=	$	1,360
Jan.	10	Sales										120	units	@	$	17.50
Jan.	20	Purchase	100	units	@	$	7.50	=		750
Jan.	25	Sales										120	units	@	$	17.50
Jan.	30	Purchase	240	units	@	$	7.00	=		1,680
		Totals	500	units					$	3,790		240	units

Required:

The Company uses a periodic inventory system. For specific identification, ending inventory consists of 260 units, where 240 are from the January 30 purchase, 5 are from the January 20 purchase, and 15 are from beginning inventory. Determine the cost assigned to ending inventory and to cost of goods sold using (a) specific identification, (b) weighted average, (c) FIFO, and (d) LIFO.