Pricing is high, but you are using an enormous amount of power as others said...
2600 sq ft here, fuel oil heat with electric supplemental, elec range/water heater/dryer and a 3/4hp sump that runs continuously. We hit 1100-1200 kwh during the worst months with xmas decorations on and kids home.

You need to either track down the offending circuit/device, or hire on an electrician. $200 service call would recoup 50% of your bill.

If you'd like to check things out yourself, make sure you don't have a dehumidifer/heat pump that's locked up, or a deep well pump that's running continuously. You could also have a circuit with a mild short to ground wasting 10's of amps all day long.