First In, First Out (FIFO) The first in, first out (FIFO) method assumes that the first unit making its way into inventory–the oldest inventory–is sold first. For example, let's say that a bakery ...

There are two methods of accounting for inventory that affect a business's reported profits and taxable revenues: FIFO and LIFO. FIFO, first-in first-out, keeps the first inventory stocked on the ...