Suppose a friend planning a shopping spree on the day after tells you he plans to buy a 65-inch plasma tv, and you say "there's no way you can afford that! " he then tells you that the store is offering 50% off any one item, and he has an internet coupon good for 50% off any price, even a discounted one. so that's 100% off, and he'll get it for free! explain why your friend will come home very disappointed