Online Store problem- How much to charge for prints?

Hey everyone!

I am going to start making 8x10 prints of the pictures on my photos page. The problem is, i do not know how much to charge. I was thinking of this because for the frame, the print, and shipping will cost me around $15. I dont know what would be a resonable price, because i want to make a little profit with out over charging.

Please post your feedback.