Monetary cost, as already noted, reveals an exact upper bound on the amount of energy needed to build and deliver the goods: people doing those get no discount

Monetary cost, as already noted, reveals an exact upper bound on the amount of energy needed to build and deliver the goods: people doing those get no discount on their power bill. The price also includes labor, administrative and marketing costs, tariffs, taxes, and whatever profit was taken, less any public subsidy or loss-leader discount.