Fundraiser price?

I was asked to help with a Boston butt fundraiser for the boy scouts. They want me to cook Boston butts so that they can sell them in Halfs along with sides as a family meal. I was thinking of charging $8.00 per butt I cook. I have a stick burner that I will be cooking on. I have to supply the wood and the rub as well as the foil out of the 8 dollar price. I'm I low on the price? They are thinking of me cooking a minimum of 40 butts. Any input is greatly appreciated.

Thanks for the input. Taking a tax break might be more beneficial. Thanks for taking time to respond.