Selling candy at school. help please! urgent!?

okay, well, im selling twix, snickers, etc. stuff lyk that, and im not allowed to. tips? plus, i am no good talkingto strangers, but my friends arent interested in helping! i need this for band, and it would be easier in middle school, but this is high school. how can i sell largely, but stay secret??? help please! trying to get ot hollywood with band!