How much do a full head of highlights cost? Best answer!?

I usually get highlights at a high end place but i need to get my highlights by tomorrow at a place near by which is an average hair salon. I am getting what i usually get which is a full head of blonde highlights. I have hair that is pretty long...middle of my back...and not thin but not thick. How much do you think they would cost? I know you can't know for sure but just on average? I live on the east coast too if that helps. Also i know that a blowout there is $45...if that helps you know what "class" the salon is. Thank you!