[virgil283]

Here are some cost estimates: $4.95 per gallon Kero works out to $36.68 per million BTUs. Most propane delivered by truck is in the $2.60/gallon range. This would be $28.57 per million BTUs.

Thanks Eric, you make all that seem simple.....and easy to understand.

[Eric in the Ozarks]

You're welcome.
My background is in selling coal and heavy oils which have various heat contents. A buyer wants to know his or her true cost of energy, not just “per gallon” or “per ton.”