Cost of goods sold available for sale using Lifo? how can i do it?

also, the weighted average?

and plz the last question :(

Numeric Response -place your numeric response clearly within the box (2 points each) Inventory Inflows and Outflows for Dalton Company Inventory, April 1 Purchases, April 10 Purchases, April 20 Goods available for sale 100 units 80 units 70 units $10 per unit $11 per unit $12 per unit $1,000 880 840 $2,720 250 units Sales, April 18 Sales, April 27 Inventory, April 30 (90) units 140 units (50) units 1 10 units 3. Determine the cost of goods sold for Dalton Company, assuming perpetual LIFO method 4. Assuming perpetual weighted average method, determine the cost of ending inventory for Dalton Company (round 5. Better Buy Electronics reports inventory using lower-of-cost-or-market. Below is information related to its year- to the nearest cent) end inventory. (Assume the company applies lower-of-cost-or-market rule to each inventory item separately) nventory items Flash Drives Wireless Keyboards 38 iPad cases iPhone cases Calculate the cost of ending inventory under lower-of-cost-or-market Cost/unit rket value/unit $30 43 23 18 $32 40 27 17 30 32 35