the answer is -$97 for sure. 5.39.217.77. v1 Y& [/ O2 i: e
Think about it this way tvb now,tvbnow,bttvb7 R4 ^/ b1 o( a& @& e0 D5 G* u: |
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
- z8 B0 Q2 _0 Q. YTVBNOW 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。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 |