[support] Pay for Event

[Robert Morse]

We have a site with Event and Signup installed. Is there a simple way to
allow people who have signed up for an event to pay for it via PayPal? I've
looked at the PayPal related modules, but it's not clear any of them are
appropriate. I looked at Fee, but the description says it assumes the entire
site is for a single event.

Seems like this would be a natural thing for many sites to want to do. What
am I missing?