solve the following exercise

PE 7-3A Perpetual inventory using LIFO Beginning inventory, purchases, and sales for Item Zebra 9x are as follows April 1 Inventory 420 units at Sale 10 Prchase250 units 300 units 280 units at 5 18 27 Sale Assuming a perpetual inventory system and using the lass-in, ficst-out CLUFO) method, detce mine (a) the cost of sold on April 27 and (h) the inventory on April 30