Writing and Dramaturgy wages?

Dear Reader, I am currently doing out an assignment for my acting studies, and need some help. We are filling out grant applications - and I've run into some trouble with the costs of directors/dramaturgs and writers! Since there is no pre-defined minimum wage (as far as I can find) - I was wondering if anybody would be willing to share either what they charge, or what they have been charged in the past? This way I can average them out, and find a happy medium. Any help would be much appreciated! Thanks and Godspeed, -Th3o.