Outside our small safe place flies Mystery... A snake beneath the forest floor, a whisper: Melusine

Have any of you out there ever had to come up with how much you are worth?  I'm not just talking about putting a price tag on self worth, I mean HOW MUCH would you think someone should or would pay for what you do?  It's one of the toughest questions I've had to answer.  When I was in art school, no one taught me how to gauge my worth as an artist.  I'm going to be doing a comic book for the Red Cliff Chippewa tribe and I have to come up with some ball park prices.  I've had a few previous jobs doing comic strips and art, but those were pittily-scquat non-profit mostly for exposure jobs.  I'm excited about the project because it will be the first time a comic book will be published in the Ojibwe langauge.  I will be doing not just pencilling, but inking and lettering.  Let me know what you think how much I should price myself!  I'm thinking, so far, many $25 to $50 a page for pencils and then maybe coming up with a charge for how much money I will be spending on paper and supplies, as well as time.  That's all for now!