whats answer A and B?

thanks.

33. Beginning inventory, purchases, and sales for an inventory item are as follows: $10 24 units 17 units 10 units 8 units Sept. 1 Beginning inventory 5 Sale 17 Purchase 30 Sale $15 Assuming a perpetual inventory system and the last-in, first-out method, determine (a) the cost of the merchandise for the September 30 sale and (b) the inventory on September 30. (a) Cost of merchandise sold for 9/30 sale (b) Ending Inventory on 9/30 e