Well, to me, that's a huge chunk of money. I just about had a heart attack when my bill went over $100 for a couple of months. But I'm sure the way things are for some stations nowadays......any chance to save even a nickel....they'd go for it, whether your a huge conglomerate or a mom & pop station.
Think of all the expenses, a station has: salaries, Social Security, health, insurance participation, business insurance, liability, insurance, rent, telephone, electricity, connectivity, legal costs, salaries for traffic, accounting, air, personalities, sales, staff, office, staff, engineering, and maintenance, equipment, repairs, and maintenance, music licensing, transmitter site, and studio office space rental , sales commissions, agency, commissions, sales, rep fees, travel, and entertainment, FCC fees, business, licenses, and permits, Computers, computer, maintenance, software and software, licensing, advertising and promotion, memberships in community and industry, associations, attendance at conventions and seminars, outside consultants and auditors, and many other things involved in the operation of a radio station.
Compared to all these things, the electric bill is truly a very minor expense. In fact, it is only burdensome if you have a station in a small market with a higher powered transmitter where they added coverage of higher power produces no income.
This is just speculation, but I saw a recent filing for a 50,000 watt AM station in Petoskey Michigan, which wanted to go silent. I am thinking that such a station on AM in such a small market in an area with terrible ground conductivity producing very limited coverage is likely not going to be able to bill enough to pay that electric bill. Eventually, we will see some stations like that either reduce power and just serve their local community or simply disappear if they cannot use the AM to get a translator.