This document compares the FIFO and LIFO inventory costing methods. FIFO assumes the oldest inventory units are sold first, reducing the cost of goods sold and increasing reported profits compared to LIFO. LIFO assumes newest inventory is sold first, increasing the cost of goods sold and decreasing reported profits. While LIFO reduces near-term taxes in inflationary periods, it is not allowed under IFRS standards and requires tracking more inventory layers. The document concludes that while LIFO defers taxes, FIFO is generally recommended due to broader international acceptance and simpler record-keeping requirements.