Ticket types classified as non-inventory items will not count towards ticket inventory or venue capacity. You have the ability to view non-inventory sales separate from total sales figures right from your homepage. Non-inventory items would be considered add-on items besides a ticket or festival pass, i.e. drinks, food , merchandise or meet and greets. Under the ticket sales options for the specific type there is a box to check for non-inventory items such as merch, food, or drinks.
Then mark “Do not count towards venue capacity, and update options!