Definitions for "commodity charge"
a throughput charge levied on the basis of the quantity of commodity flow (electricity or gas) as opposed to a capacity charge based on an estimate of peak load
a variable charge
Gas bills sometimes are broken up into commodity charges and transportation charges. The Commodity Charge is the charge associated with the amount of energy purchased from the supplier.
Keywords:  kilowatts, delivered, per, buyer, price
The price per unit of service (e.g. kilowatts) delivered to the buyer.