I have a problem with Google Analytics report that I'm trying to do.
I've set up some signups on my forms as Events. These are recorded correctly in the Behaviour reports, that show event actions and labels etc.
However, when I come to do a custom report, it doesn't seem possible to select both the "Event Label" in the dimension section and the "Advertising -> Cost" in the metric section at the same time.
I'm wondering why it isn't possible to understand how much cost each Event Label incurred?
It seems very strange that it's not possible to mix these things. Any idea why?