How to Calculate Variance in Excel . To calculate variance in Excel, you will need to have your data set already entered into the software. Once you have your data, ...

Excel will do the rest by identifying the date and calculating the age. If you really want to get specific, you can also calculate a person’s age on a particular historical date.

Adding a running total to a simple Microsoft Excel revenue sheet isn't difficult, but adding a conditional running total will require a bit more effort. Solutions are simpler than you might think.