what is ending Inventory in dollars using a PERPETUAL LIFO and FIFO AND when using average cost perpetual inventory system when the beg bal in inventory is 400 units @ 4.2

Purchases Sales May # Cost May Price 200 $7.00 1,300 800 $4.10 $4.30 $4.40 1,000 900 14 700 $7.00 $7.50 $7.50 $8.00 400 $4.50 1,200 22 1,400 29 500 $4.55