Event Registration - Limiting registrations (not submissions)

Hello, I have read various entries about limiting registrations and have looked at the widgets offered, but I'm not sure any of the options offered will work for my purposes. 

I am creating an event registration form with three categories.  One category has a limit of 8 registrants, while the other two categories in total cannot exceed 65 registrants.  The form allows up to 5 registrants per submission, so limiting the number of submissions will not work for my purposes.

I see that the widgets allow one to limit by category, but I cannot figure out how to limit total registration across two categories. Is this possible?

Thank you in advance for your help!

Never mind!  I figured out a workaround using the Inventory Widget.

For anyone who is curious, I set the two different registration limits (attendees and speakers) using the Inventory Widget, then I set the three registrant types (full registration, discounted registration, and speaker) as a separate field with their respective payment amounts.  The payment calculator multiplies these two fields to come up with the correct payment amount.

Glad to know that, if you need anything else please open a new thread, we will be glad to assist you.