Hello.
It’s possible in the Booking Calendar Business Medium or higher versions.
In the Booking Calendar Business Medium or higher versions possible to configure additional costs for selected options in the select boxes or check boxes (such options can be hidden and checked by default). It’s useful in case, if you need to add the tax cost or cleaning fee or any other additional cost for the booking. You can configure it at the Booking > Resources > Advanced cost page. Check more about this feature here: https://wpbookingcalendar.com/overview/#additional-cost
Watch it in this video guide https://wpbookingcalendar.com/help/advanced-costs-video-overview/
Test it here https://bm.wpbookingcalendar.com/
Kind Regards.
