prozzy

the answer is -$97 for sure.
8 Q+ W% P# `2 d1 z6 V1 I7 Ltvboxnow.comThink about it this way
4 C, q' Y9 N) a+ Itvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)6 ^- f- Y) ^. q& |
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