Calculating the return One of the best methods for calculating an average return for a stock investment is the XIRR function in Excel.

Marginal returns may be calculated using Excel to help determine if additional production would result in prohibitive expense.

The LOG and the LOG 10 function are both Math and Trigonometry functions. Learn how to use the LOG and LOG 10 functions in Excel.

If your business makes investments in equipment and employee benefit contributions, you may need to track the average annual rate of return over a span of time for financial reporting obligations.