Here 10/10 glow fuel is about $9.00 a gallon and gas is $3.20 a gallon.
So your looking at about $15.40 for 3 gallons or close to $5.15 a gallon.

For what your getting that's cheap. You probally won't burn a gallon a day
and probally 1/2 a gallon when you get everything set up right.