I have just a few questions about something. A fellow coworker of mine has asked me to photograph her. She will be paying me, but I have yet to bill someone for photographing them. I will be photographing her in her personal studio and her equipment, but I will be using my camera. We'll also be doing some outdoor shots as well. My question is: Since I will be using mostly her equipment but my camera for photographing, but my camera, time, and sweat equity, what would be a fair way or price to bill her? I was thinking something in the $100 - $200 price range. I'm not exactly a newb: I have about 2 years experience working for a large portrait studio corporation, but I am just learning the technicalities of photography (learning how to actually use a camera, etc.). Thank you for any input!