the answer is -$97 for sure.
3 u) y3 x6 I1 I2 pTVBNOW 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 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。0 u7 q- F+ i/ v& q
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
6 N( c/ @; x2 f" P9 E' F5.39.217.762) 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 |