Silvaire1
You are in the US, so none of my numbers are relevant to you and I would not even try to answer your question. If you want an idea of the issues with running a 172 in Europe look up part M maintenance. Fuel in my local area is at £1.80 pl (avgas) and due to rise again at the next delivery, some people have reported it has passed £2 in parts of the UK, but I have not witnessed this personally.
Rod1