prozzy

the answer is -$97 for sure. 9 h. k* H& A) g8 ~# N
Think about it this way 2 p4 ^& ?. J7 e% B0 D$ u( {3 [
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
: e! u* }, Y1 P8 s4 X6 G5.39.217.77:88982) 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