Cost is the Maximum Price to Giv

Better and Better                                                                                              Day 11

    Many people think that costs are the resources they have already paid,such as money,tome,and so on. As a result,most people spend the rest of their lives on the road to saving “costs”and never figure out what the cost is. Economics argues that cost is the maximum price to give up. Choosing A, you have to give up B, then B is the cost of choosing A. Most of the time, to choosing A, you may not just need to give up B, but also give up a series of choices. Then the choice with maximum price is the cost of choosing A. For example, when calculating the cost of college, we should not only consider tuition, but also take the income of working instead into consideration. Making friends also has the cost. On the same occasion, you make friends also with ZhangSan, so you don’t have time to make friends with LiSi, then LiSi will become the cost of making ZhangSan.

      很多人一提到成本，就會認為成本是已付出的資源。比如金錢、時間等。因此大多數人畢其一生都在節省“成本”的路上，而從未想明白成本究竟是什麽。經濟學認為，成本是放棄了的最大代價。選擇甲，就得放棄乙，那麼乙就是選擇甲的成本。很多時候，要選擇甲，你不只要放棄乙，還要放棄一系列的選擇，而代價最大的選擇就是選擇甲的成本。比如計算讀大學的成本，不僅要考慮學費，還要加上放棄打工的收入。結交朋友也有成本，同一場合，結交張三，就沒時間結交李四，那麼李四就是你結交張三的成本。 

                                                                                                            Sept.4th ,2018                                                                                                                    Bazhou.