What type of selling method sells the oldest inventory first?

The selling method that prioritizes selling the oldest inventory first is known as the "First In, First Out" (FIFO) method. This approach ensures that older stock is sold before newer stock, helping to reduce the risk of obsolescence and spoilage, particularly in industries with perishable goods. By using FIFO, businesses can maintain a more accurate inventory flow and better manage costs associated with unsold items.