Good evening Erica and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
#1 – fixed max quantity, but multiple options .. so we might have 300 capacity but want to sell tickets for adults and kids at different prices .. so the sum of all adult & kid tickets can’t go over 300.
Yes, that option is called Global stock.
It comes packaged with our Event Tickets Plus premium add-on: https://theeventscalendar.com/product/wordpress-event-tickets-plus/
#2 – fixed quantity per ticket type .. meaning we have 30 adult tickets available and 100 kids.
Yes, absolutely. That also comes standard with Event Tickets Plus.
Let me know if that helps.
Have a great day!
Geoff B.