為什麼題目答案不對????機會成本????

機會成本是指最高放棄的代價
而機會成本可包含金錢成本及時間成本
這題的金錢成本是$60元
最高的時間成本是在超級市場工作，50 * 3 = $150
所以總機會成本是 $210元

希望幫到你!~

I think the opportunity cost should equal explicit cost plus implicit cost.
In this case, explicit cost is the cost of the ticket, i.e. $60 and the implicit cost is the opportunity cost of selecting to buy a ticket to watch a football match,i.e., earning 3 hours wages $150 in supermarket.

So, I think the answer is 2, it is right?

做一些清潔工作賺取$l40

於超級市場工作賺取每小時$50 -咁3個小時賺150 la~

機會成本refer to thr cost express in the term of highest value option forgone
所以係(4)$150 ,因為於超級市場工作比清潔工作賺多d

the opportunity cost is the cost to give up the highest valued option forgone....

you give up the salary received from working in surpermarket (50 X3 ) = 150

and also you need to pay for the ticket for the match, it cost $60


Totally, the cost is $210 (Ans 2)

2006-12-06 23:38:00 補充：
If the ticket have already bought and you can't sell it to other to get back the money.....then it is sunk cost already, then under this situation the answer should be $150 only (Ans 4)But if John hasn't bought the ticket before he made the decision , then the answer should be ans. 2

answer is no.2 - $210??????