Report Settings

In Report settings, you can set the maximum number of Formula Exceptions (up to 999) that users can create while working on a Dynamic Report. When a Formula Exception is applied to a cell in a report, the cell value will depend on the applied exception. If the cell had any formula, the exception will even override the previous formula and use the exception created as part of the applied Formula Exception.

Based on the limit set, you can create your own number of exception formulas in Dynamic reports. This helps to perform custom calculations in each report. 

The Exceptions include invalid formulas.

See Dynamic Reports, for adding the Formula Exceptions.