First of all, I don't consider myself a professional photographer and haven't sold many photos. But, I work part time at a middle school and someone asked me about helping the school with a fund raiser. They asked me to take photos of the students at a dance and sell the photos to the kids then split the money with the school. They have done this in the past and usually let the students pose any way they want or with their friends in the photos. I thought I would take the money up front for the photos, then deliver the pictures in a week or so. Should I just print one size photo, say 5x7? What should I charge for this? Any suggestions where I could have a large number of photos (maybe 150) printed? Any suggestions or experiences you can share would be appreciated.