Hey @May-i,
Thanks for reaching out. Can you clarify a bit more about what you mean here? Do you mean that, if the user has two tabs open, one with the cart and one on the original event page, the same “cost” will show on both pages?
If that is not what you mean, then can you explain a bit more about what is currently happening, compared to what you want to happen?
Sorry for my misunderstanding of things; I just want to be sure I understand your request so that I can best recommend a way forward.
Cheers!
George