I think it's about more than costs. Who provides the propane, vs. who provides the sunlight? Propane is still a fossil fuel, and relies upon infrastructure to get it to you. Sunlight beams down on its own accord...
"Forget pounds and ounces, I'm figuring displacement!"
If we accept that: MBG(+)FGSF(=)HBG(F1) And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1) Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT? PB answer: It depends.
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