the answer is -$97 for sure. www3.tvboxnow.com# }# t1 H- H0 k( i: Y
Think about it this way
* {7 i9 O4 x9 ?: K% V, i2 WTVBNOW 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)
- Z3 u3 Z6 O& |/ t! mTVBNOW 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 |