Much of what you can charge is based on several factors:
1. The quality of your work
2, Regional pricing
3. Client perception of your abilities and the value of your work
4. You providing prints vs. clients getting their own printing done
5. Limitations imposed by your camera systems
6. Limitations imposed by your level of knowledge and artistic vision
7. Your salesmanship skills
I'll give you good example to start with. I just contracted a shoot for a young girl that needs a starter portfolio created. If her mother would like the images on CD with a release to use them for submission to modeling agencies and her own printing needs, my fee is $500 (which is a bargain around here) and I will not guarantee the quality of prints if she does not buy them from me. If she just wants the shoot, a set of proof prints for viewing in my studio, the sitting fee is $200 of which $100 may be applied to print orders over $200. I bring in anywhere from $250 to over $1K per client (gross, before cost of prints and taxes). I know some photographers who bring in $3K orders.
However, there is a huge difference. We control the quality of the printing. Your percieved value can really take a hit if you hand a parent a CD and then they go to Walmart to get prints made with funky color shifts, etc. If you want to control the quality, I suggest you make your clients come to you for prints and use a quality lab.
I encourage you to handle the print order process if you can manage it. Photographers charge anywhere between $15 and $100 for an 8X10 - and even at $15 or $20 - or even $12 for that matter, there is profit to be made. People will often pay $10-$15 for a 5X7, $20-$25 for a good 8X10 without blinking an eye.
There are ways to set yourself up for success from the beginning. If you need detailed information, please feel free to post your questions here so others can learn, or PM me with private questions. What equipment are you shooting with?
I'm a full time professional photographer in FL, so I have a good bit of information to share on nearly all aspects of professional people photography (weddings, portraits, kids, families, etc.). There are a couple of other full time professionals that used to visit here, but I haven't seen them for a while.
Chris