When you are smoking, Everyday you tink the cost is small, because once time you only somke one cigarette, but when one year past, the cost is so big.
For example, number of cigarettes in a pack is 20, the price of a pack is 5 dollar, and everyday you smoke 15 cigarettes, then monthly the cigarette expense is 337.5 dollars, yearly cigarette expense is 4106.25 dollar. The expense maybe could buy 20 iPhones. So big cost!