Your meter reader may have misread the meter or transposed some numbers. Pretty common. Have he power company re read the meter. They will try to tell you to pay the bill and they will correct it next month. Dont do it. Tell them you will file a complaint with the PUC. Any electrician should be able to read the meter for you.
If you have a large dog in the yard, meter readers wont come in and use binoculars. Some will deliberately inflate the bill to force you to keep the dog in.