the answer is -$97 for sure. 2 e o5 f% T3 f+ F/ \1 r9 `
Think about it this way 5.39.217.77& O- D* B! o& u
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)5.39.217.77' x' j9 w3 J) r. b4 P0 \) [5 j
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 |