Limit on total submissions for a number field

I’m working on a registration form for an event. The registrant may be solo, a couple, or a family, so they could enter 0-5 for number of attendees for a given daily event. If we have a session with a limit of 50 people, I’d like to disable the number field and show a “session full” message after the total number of people selecting that option has been reached. Is that possible with Forminator?

I can see how to limit the number of submissions for an option, but it would be difficult to use an select field in this case, when the number attending a session can vary. I tried searching the forum, but couldn’t find another example like this. We’re using the free version, fine with moving to pro, but not sure if it’ll help for this.