How do I limit the number of submissions for a Radio Button field?

I'm doing the form for an upcoming conference.  I'm using the radio button options for attendees to select their presentation choices, but I can only accept 50 attendees per selection.  How can I automatically limit this so that if it does hit 50, the selection won't be able to be chosen?

Hello WisCounsAssoc,

I believe the Inventory widget is a more applicable tool for you to use in order to limit 50 attendees per selection. You can make use of this inventory widget by following this link: https://widgets.jotform.com/widget/inventory

If you have questions, please let us know.

Thanks.