the answer is -$97 for sure.
* B5 d5 B4 d, ^ e" m+ LThink about it this way
$ J' d' D0 m& f& J5 \( ~TVBNOW 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。1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)- [8 Z7 p4 ^5 x" D3 h6 A
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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