the answer is -$97 for sure.
* L- v6 ~8 f! [www2.tvboxnow.comThink about it this way
0 c, a& N8 C! ~5 B9 H# Y& F5 ~www2.tvboxnow.com1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)公仔箱論壇4 @* H8 n1 x" v
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 |