graphic communications

I’m still a advertising and graphic communications student, so based on that and also the fact that this is one of my first clients and I’m still trying to build my portfolio… Could you give me a fixed rate for how much I should charge for the ART FEE? Not how much to charge to get them printed because I already know that info. I just want to know how much to charge for the actual design. If you want you can suggest an hourly rate as well. Thanks to you in advance…