I took some photos a while back and the company contacted me yesterday asking if they could use them in a small newsletter, circulation of 100. They asked if I can advise them about copyright details. I'm not sure if that means they want to know the price, or just what to put on the photo. Either way, to be safe it would be a good idea to give them a price. The question is, how much? I know how much to charge per hour and such, but not per newsletter circulated.