the answer is -$97 for sure.
" v) H5 V A9 [os.tvboxnow.comThink about it this way os.tvboxnow.com' _$ P( C2 H7 P8 B
1) if the 100 bucks is not a fake one, the store owner will gain $3 ($21-$18)
8 L: ~3 q1 K& t6 G9 A* T. ], OTVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。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 |