In northern Illinois where I live, electricity is provided by ComEd.
However ComEd is really two companies. One delivers electricity and
the other generates electricity. In my last bill, that portion that
was billed for "Electricity Supply Services" accounted for only 55
percent of the total bill. As the guy who writes the checks, the
simple formula I use is Total Cost / kWh. This comes out to $0.149 per
kWh. On the bill the stated cost of a kWh is only $0.06968.