Across the school there are 2 candy stores that sell candy by the pound. Both candy stores have the same assortment of gummy bears, gummy worms, cola bottles, fizz pops and chocolate coated raisins. Both stores have exactly the same prices for the same kinds of candies.
Question: Why do kids prefer to shop at one of these two stores and not the other one?
Answer: The kids prefer to shop at one of two stores because the cashier adds the candies to achieve the desired weight, while cashier at the second stores removes the excess candy.