Custom summary formulas allow you to enter a calculation using the numeric fields that are available within the report type. This means that you do not have to create custom formula fields for calculated results if they are only relevant in reports. Formulas must be 3,900 characters long or shorter. Up to five formulas can be created per report. The fields that are available for custom summary formulas are Number, Percent, and Currency.
You can create custom summary formulas by navigating to the Fields pane, where, at the top, you will see the formulas folder icon. By double-clicking on the Add Formula option, you can define it and then click on OK.
After you have defined a new formula on the report, it automatically appears within the Preview pane, where it can serve as a field column on summary report formats and operate similar to a summary field on...