Hi Graham,
Thanks for using our forums and reaching out to us with this question.
First and foremost I will tell you that this is completely up to your WooCommerce installation, we only use the price on the order to track down some reports.
There are a few good plugins for WooCommerce that will accomplish that, I will point you to one (WooCommerce Bulk Discounts), and if you want you can look further. I mean we only create the product and create the link From the Ticket to the Event, everything on the product side is managed by WooCommerce.
I hope this solves your issue.
My Best Regards,