Suppose you plan on eating 50 potato chips. As you start consuming potato chips, your marginal utility is very high, but it begins to fall slowly until you’ve eaten 10 chips. After you have eaten 10 chips, your marginal utility decreases even faster with each additional chip. Marginal utility continues to decline until you’ve eaten 49 chips. The fiftieth chip does not give you any additional utility. After 50 chips, your mouth gets so salty that it is unpleasant to eat any more, so marginal utility is actually negative for those chips. How many chips should you eat in order to maximize your total utility?