Participant-dependent pricing

Hello,

while configuring the plugin on our website, we encountered a problem. We need to charge each appointment based on the number of people participating in the booking. What′s working is, that we can charge based on the number of people (Multiple Quantity Addon). The problem is that it is possible to book another appointment at the same time when the max capacity is not reached. That is not possible with our business as we are renting out a conference place.

Do you have a solution for said problem or do you have another idea how to solve this?

Thanks in advance.