Here's a link which, no doubt, has been posted here before. I probably just haven't seen it in the archives yet.
http://www.fpl.fs.fed.us/documnts/techline/fuel-value-calculator.pdf
The market values per unit of fuel are obviously outdated but easy enough to convert into todays prices.
http://www.fpl.fs.fed.us/documnts/techline/fuel-value-calculator.pdf
The market values per unit of fuel are obviously outdated but easy enough to convert into todays prices.