I have to cook up 4 PB for my brother in about a week for a party he is having, was thinking about leaving a few "calling cards" out next to the meat thought this might be a way to make a little extra gas money lol any ways i got to thinking what would i charge to do this?...... i just seen a 10lb PB at wally for $21.00 then a 20lb bag of royal oak is about $11.00(need 2 bags) at th GFS store figure in $5.00 for seasoning that is already $48.00 and thats figuring in my time and effort so my question is how do you guys charge people what is the formula???