If Leo thinks he has a case he might ask the electric company regarding your electric usage, but I believe this seldom happens.

The following formula will help you determine your electric cost:

Watts/1000 = KW X Hours of operation = kWh X KWh rate = Cost.
(you can find the Kwh rate on your bill somewhere, or just call the company and ask.

Some common household appliances and their average electric consumption:

Electric Drier - 5,000 watts
Average Refrigerator- 750 watts
Electric Stove- 12,500 watts
Hair Drier - 1,600 watts
Central Air - 12,500 watts
9,000 BTU window air conditioner - 1,050 watts
Portable electric heater- 750 to 1,000 watts
Hot water heater- 3,800 watts.

Peace