how do i get the average cost

Determine the cost assigned to ending inventory and to cost of goods sold using FIFO. (Round cost per unit to 2 decimal places.) Perpetual FIFO: Date January 1 January 10 January 20 January 25 January 30 Totals Goods Purchased Cost of Goods Sold Inventory Balance Cost per units 1709 @ 3409 @ # of units sold 170 e 13.50 30 30 13.00 cost per unit 23.50 14.50 13.50 Cost Of Goods Sold 3,995.00 $ 43500 405.00 84000 4,835.00 # of units 220 50 15 140 0 340 Cost per 14.50 14.50 14.50 13.50 14.50 13.50 14.50 13.50 13.00 Inventory Balance 3,190.00 $ 725.00 $ 435.00 675.00 1,110.00 s 217.50 $ 217.50 1 ,890.oo 4,420.00 6,310.00