I have seen posts about charging for DECORATED cookies but not for this... I have a friend who has a restaurant. She would like me to bake her a tray or two -- as a trial -- of a bar cookie recipe that I make for her for the holidays every year. Since this is a business arrangement, she wants me to charge her for them. I have never done this before. Beyond the price of the ingredients, how should I calculate this?Many thanks in advance. WHAT AN INCREDIBLE FORUM THIS IS!