prozzy

the answer is -$97 for sure. 公仔箱論壇, G: Y5 V  _  O
Think about it this way 5.39.217.76" d# f, X1 j0 ^
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)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。2 R# A" o' Z1 G( e/ N2 J2 `
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