2. SUM functions. Probably the most frequently used function in Excel (or any other spreadsheet program), =SUM does just that: It sums a column, row, or range of numbers—but it doesn’t just sum.

The AVERAGE function calculates the mean of a range of numbers by summing them up and dividing by the count of numbers. Here's the syntax for the AVERAGE function: =AVERAGE (range) Where range ...

For example, the S&P 500 index is ... Here's the general formula for calculating weighted average cost of capital (WACC): Image source: The Motley Fool. Here are five steps that will make this easier: ...

One example of average return is the simple arithmetic mean. For instance, suppose an investment returns the following annually over a period of five full years: 10%, 15%, 10%, 0%, and 5%.

Average inventory is frequently calculated by using the number of points needed to accurately reflect inventory activities across a certain time. Here’s the formula.

For example, over the last 10 years, the S&P 500's average annual return was 11.21%, and it had an annual standard deviation of about 15.25%, according to Morningstar.