Logic 哪一门逻辑

Two people were going fishing. They went a long way to buy the equipment, bait and a video camera. Then they drove to the seaside. The roads were bad, and their car was badly damaged, with dents here and there. Most of their equipment was damaged, too.

After they reached the seaside, they caught only one fish. One of them said, "Business was really bad today. Do you know how much we spent on this one fish alone?"

The other answered, "Of course, I do. We spent two thousand dollars on just this one. It is a little too much!"

The first person then said, "Good thing we didn't catch more, or the costs would have been even higher. Two thousand dollars for one fish!"

有两个人去捕鱼，他们走了很长的路，买了很多工具、 食物和录影器材等，然后开车去海边。由于路不好走， 因此车子撞得乱七八糟，破这边、破那边，工具也损坏很多。

到海边后，他们只捕到一条鱼，其中一个人讲：“今天亏本了，你知道我们花了多少钱才捕到这条鱼吗？”

另一个人说：“当然知道，我们花了两千块美金才捕到， 太过分了一点！”

第一个人说：“还好没有捕更多，不然就更亏本了，每一条鱼要两千块美金啊！”