What the calculation measures
This periodic-inventory formula connects inventory movement to the cost recognized against sales.
How to interpret the result
Use consistent inventory valuation rules and accounting periods so COGS comparisons remain meaningful.
Run scenarios instead of one answer
Change the most uncertain input and compare outcomes. A calculator is most useful when it shows sensitivity, not when one estimate is treated as a guarantee.
Limits and assumptions
Accounting standards, manufacturing overhead and write-downs can require professional accounting treatment.