Perpetual Inventory Using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows:

Oct. 1 Inventory 51 units @ $25

7 Sale 39 units

15 Purchase 54 units @ $28

24 Sale 19 units

Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, determine (a) the cost of goods sold on October 24 and (b) the inventory on October 31.

a. Cost of goods sold on October 24

$

b. Inventory on October 31

$