Perpetual inventory using LIFO OBJ. 3 Beginning inventory, purchases, and sales for Item Zebra 9x are as follows:

April 1 Inventory 420 units at $8 10 Sale 300 units 18 Purchase 280 units at $9 27 Sale 250 units Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, determine

(a) the cost of merchandise sold on April 27 and

(b) the inventory on April 30.