prozzy

the answer is -$97 for sure. 5.39.217.766 f' N, X8 @) H& u! j
Think about it this way
0 n( }2 m, _4 A* Z3 w; ~( c* ztvb now,tvbnow,bttvb1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
3 b! v% G% x3 w* S5.39.217.762) 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