What does Sandles charge to use a credit card on the Island?

I'm going on vacation and don't want to carry alot of money ,but I was wondering what the charge would be to use my credit card.
What does Sandles charge to use a credit card on the Island?
Why not call Sandals and ask? Sandals are all inclusive, typically, so I'm not sure what they'd be charging you for. . . other than your stay.
What does Sandles charge to use a credit card on the Island?