Gross profit calculation employing the First-In, First-Out (FIFO) inventory valuation method determines profitability by assuming that the first goods purchased are the first goods sold. To execute this calculation, one must first identify the cost of goods sold (COGS). This is achieved by tracing the cost of the oldest inventory items to the initial sales. The total revenue from sales is then reduced by the calculated COGS. For example, if a business sells 100 units and the FIFO method assigns a cost of $10 per unit to those sales, the COGS is $1000. If the revenue from selling these units is $1500, the gross profit is $500 ($1500 – $1000).
This methodology offers several advantages. It provides a more accurate reflection of current inventory value on the balance sheet, especially during periods of inflation. As older, lower-cost inventory is expensed first, the remaining inventory more closely reflects current market prices. Historically, FIFO has been favored for its simplicity and perceived alignment with the actual flow of goods in many businesses, leading to wider acceptance and use in financial reporting.
