The event cost field is hidden when a ticketing plugin like WooTickets is activated (since that works differently and can support a range of prices per event).
However it is the event cost field that the “price” refers to in this context so, unfortunately, it isn’t available.
It would definitely be worth considering paths to integrate the two more tightly though, and if you are down to describe your use case on our UserVoice page others could also show their support for this (or you may find an existing entry for this that you could show your support for):
https://tribe.uservoice.com/forums/195723-feature-ideas