Some of those figures are totally inaccurate though. For example, you're just not going to get 4gal/hr out of a C150. And I don't know about you guys, but 100LL in these parts isn't anywhere close to $2.20/gal. Like I said, the best thing is to use this as a guide for things you need to pay for. All you have to do is insert the your local area costs and youre on your way...