“Decremental” value

Hello,

I have a form which is a registration for webinar. There are usually two or more dates of the webinar and users register for particular date. But there is a limited capacity of each webinar and I’d like to have a field in form which would show numbers of free ‘seats’ of webinars based on all entries and when there’s no other free seat it will disable registration for that particular date. Is it possible to do something like this with Caldera forms?

Thank you. 🙂