You have to add it into the food. Of course, that means you have to have enough experience to know about how much you will sell. I take the amount, add it into food cost.
Thus if I have $1500 of food cost, I add in the $250 and then add on 30% and now you know why food costs so much at most festivals and shows. Makes a $6 sandwich into a $10 sandwich
me: I don't drink anymore
Yelonutz: me either, but, then again, I don't drink any less