英语噶Five years ago a man bought a car for £9,000.It deve

英语噶
Five years ago a man bought a car for £9,000.It develops an electrical fault that would cost £400 to repair.A new model would now cost £12,000 but the man would only receive £4,000 should he sell his own car on the second hand market.What is the present opportunity cost of him owning the car?
问的是在这一过程中机会成本是多少,也就是说问他为了买车而失去的成本是多少,答案是4000.会的人麻烦用中文详细解答,如果加上英文翻译,我补充50分
对不起,打错,修好了