Beginning inventory, purchases, and sales for Item Doodad are as follows: Assuming a perpetual inventory system and using the first-in, first-out (FIFO) method, a. Cost of merchandise sold on July 24 b. Inventory on July 31 Beginning inventory, purchases, and sales for Item GY9 are as follows: Assuming a perpetual inventory system and using the last-in, first-out (LIFO) method, deteri