First in, first out (FIFO)

First in, first out (FIFO) is an asset-management and valuation method in which the assets produced or acquired first are sold, used or disposed of first and may be used by an individual or a corporation. For taxation purposes, FIFO assumes that the assets that remain in inventory are matched to the assets that are most recently purchased or produced.The actual flow of inventory might not match the first in, first out model.

In other words, the oldest products are shown constantly at first in the product stand in order to get a smart rotation for the products.