Like in a supermarket the user is afterwards astonished that the many cheap goods in the basket (comparably maintenance requirements) cumulate to a large sum at the cash point.

• 结果往往是如同一个在超级市场购物的顾客结账时惊讶地发现，购物篮（我们可以将其比作软件维护的需求）中一些本来很便宜的货物算在一起居然是一个很大的数目。