LIFO is only allowed in the USA, whereas, in the world, companies use FIFO. In the USA, companies prefer to use LIFO because it can help them reduce their taxable income. Furthermore, when USA companies have operations outside their country of origin, they present a section where the overseas inventory registered by FIFO is modified to LIFO. You can also check FIFO and LIFO calculators at the Omni Calculator website to learn what happens in inflationary/deflationary environments.
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