About Using Supporting Detail
If you want to build logic into how a cell value is calculated, you can use the built-in calculator, called Supporting Detail, to develop that value and save your assumptions behind the value.
For example, say you want to plan for—using your own logic—the travel expenses for an upcoming quarter. This example shows how you could use Supporting Detail to plan travel expenses:
![Supporting Detail example showing Air Fare and Hotel calculated Supporting Detail example showing Air Fare and Hotel calculated](img/support_detail_3.jpg)
You can include text, numbers, and operators that define how data is calculated. See Adding Supporting Detail.