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I'm lost. i get it started and then get lost with where things go and how they go? Can someone help me 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. Units sold at Retail Units Acquired at Cost 175 units @ $10.00 = $1,750 135 units @ $19.00 Date Activities Jan. 1 Beginning inventory Jan. 10 Sales Jan. 20 Purchase Jan. 25 Sales Jan. 30 Purchase Totals 130 units @ $ 9.00 = 1,170 140 units @ $19.00 250 units @ $ 8.50 = 555 units 2,125 $5,045 275 units The Company uses a perpetual inventory system. For specific identification, ending inventory consists of 280 unit 250 are from the January 30 purchase. 5 are from the January 20 purchase, and 25 are from beginning inventory Required: 1. Complete the table to determine the cost assigned to ending inventory and cost of goods sold using specific identific 2. Determine the cost assigned to ending inventory and to cost of goods sold using weighted average. 3. Determine the cost assigned to ending inventory and to cost of goods sold using FIFO. 4. Determine the cost assigned to ending inventory and to cost of goods sold using LIFO