prozzy

the answer is -$97 for sure. tvb now,tvbnow,bttvb8 v: x% C' q3 r
Think about it this way 公仔箱論壇0 t: l; I) {: F2 a
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
- [& f6 f6 p2 H" H( s2) 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