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FIFO Inventory Cost Calculator

This calculator uses the FIFO (First-In, First-Out) method to determine the cost of goods sold and ending inventory. It assumes the oldest inventory is sold first — ideal for accounting, retail, and inventory valuation.

FIFO Inventory Valuation Tool

Input Fields
EI
Number of units remaining at the end of the period
U1
Units purchased in the first batch
C1
$
U2
C2
$
U3
C3
$
If enabled, the result will update automatically when you change any value.

FIFO Cost of Goods Sold Formula

Formula
$$\text{COGS}_{\text{FIFO}} = \sum \left( \text{Cost of Oldest Units} \times \text{Quantity Sold from Each Batch} \right)$$

Explanation:
Under FIFO, the cost of the oldest inventory is used first to calculate the cost of goods sold (COGS). This method matches real-world stock movement in most industries and typically results in lower COGS and higher net income during inflation.

FIFO (First-In, First-Out) is one of the most widely used inventory costing methods in accounting. It reflects the physical flow of inventory in businesses like grocery stores, manufacturers, and e-commerce where older items are sold first.

Use Cases:

  • Inventory tracking for financial reporting
  • Estimating profit margins
  • Preparing tax documentation
  • Comparing FIFO vs. LIFO inventory costs

Example:
You purchased:

  • 100 units at $5
  • 200 units at $6
    You sold 250 units.
    FIFO COGS = (100 × $5) + (150 × $6) = $500 + $900 = $1,400

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