please, help with Perpetual inventory FIFO

Perpetual imventory using FIFO Beginning inventory, purchases, and sales for Item Zeta9 are as follows: 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 fold on October 24 b. Inventory on October 31