I need to sell tickets in four different price points, each ticket is general admission with a max room capacity of 80.

So a $1, $2, $3, and free ticket will decrement a pool of 80 tickets. Not 80 tickets for each price point nor 20 tickets for each price point but 80 tickets total, dispersed in any combination of price points and ending sales at 80 tickets sold.

Unfortunately, there is no option to calculate the ticket limits as a whole. For example, you will be using Ticket Purchase or Inventory widgets, each item should have its own limits (that you'll set).

And even if we use the Stock Control feature of the Product List field, each product will have its own limit as well. So the only method I can see to achieve the requirement is to use the SUBMISSION LIMIT option. We will disable the form once the required submissions are received. Here's a guide for that: https://www.jotform.com/help/137-how-to-limit-submissions-in-a-form#submission-limit

So when you set 80 as the submission limit and the form already received 80 submissions, it will no longer receive new submissions.

Please try that and let us know if that'll work for you.