How much do I charge for a photoshoot?

I've been doing film photography for a long time but recently started doing photoshoots for local bands and amateur models. This is my first time working with others so have no real idea what the current rate is among amateur photographers. On average I spend around $25 to shoot a role of film ($12 for the roll $12 to develop + scan). Obviously I should charge $25+ to break even but how much more? I wouldn't want to charge way over the current market and looking for a range most people would be comfortable booking. Also I am looking for a rate per roll of film.

Photographers, what are your rates and what would be a reasonable median?