Hi, I bought a su-do body art kit, it came with a price chart that you put your own prices on, can anyone give me any advice as to how much to charge for these? basically there are three sizes small, medium and large, and one, two or three colours, so 9 price bands in all!! also there is a space for a price for bodyrocks. I havent got the first idea how much to charge for these.......HELP!!