FIFO (First in, First Out) reports higher gross profit and net income than the LIFO (Last In, First Out) method when prices are increasing. The FIFO method refers to an inventory system wherein the first items purchased are thought to be sold while the most recent purchases make up the ending inventory. On the other hand, the LIFO method assumes the opposite. The ones sold are the most recent purchases while the earlier purchases are included in the ending inventory.