Choreographers, Coordinators, MC`S HELP

I am a sweet fifteen choreographer, coordinator and master of ceremony. I used to do it for fun or to help out, but now the word is getting around because the parties are so beautiful and memorable. Now its turning into business, the problem is, i have no idea on how to charge for any of these services. Can you please tell me how do you charge so i can have an idea??? tickticktick5@yahoo.com