So a co-worker asked if I'd like to take some family pictures for her and offered to pay. I suggested $50 plus the cost of film, developing, and prints. She agreed, but I want to confirm that this is a fair price. She wants me to do one roll in black-and-white (I'll probably be using Fujifilm Neopan ISO 100) and one in color. I am thinking of using Fujifilm Astia ISO 100, but am also researching Provia. What are your suggestions? The pictures will be taken in a park. Thanks.