How much do I charge to run a businesses facebook page?

[Vagabond M]

How much do I charge to run a businesses facebook page?
I have a small Business that wants me to create and then maintain a facebook and twitter account. And they want to know how much I would charge them per month to do it. Does anyone know know how much I should charge or how much a business might charge to do it, because I think there are business that do create and maintain facebook and twitter accounts for other business. So I don't know how much they charge or just how much I should charge. Thanks.

[Scott]

Running a facebook/ twitter page is not very hard. Don't tell the business though