the answer is -$97 for sure.
4 M+ p! G6 y- j STVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。Think about it this way
7 B: k/ w) j2 r' l公仔箱論壇1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.77:8898, ]2 i- }" y/ j- w6 M
2) Now, the owner discovered that the 100 bucks is fake. You can think this as a lost of $100. therefore the overall gain is $3-$100 = -$97 |
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發表於 2007-5-21 03:49 AM
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