In a List, I've got several number columns that users enter a value in for # of tickets.
Event 1 - [ ] tickets
Event 2 - [ ] tickets
Event 3 - [ ] tickets
Is it possible to validate the sum of the three ticket values? For instance, let's say I want to cap the number of tickets at 8, how can I validate to check the sum of the three columns and compare that to 8?