Whilst Book That In is a system that primarily allows businesses to take bookings for events, you may also want to give your customers the option to buy products, or additional services from you when they book.
These could be considered 'upsells' or 'extras'.
For example, a ballet dance class might also sell ballet shoes; a campsite might offer electric hook up for an additional fee; a trade show might offer an upgrade to a bigger table.
The possibilities are endless! And you can increase the value of your sales by offering these kinds of upsells by creating Product Extras in Book That In.
This video shows you how you can create Extras to sell products:
Related:
How to add siblings or extra people to booking options