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197
197 is the right answer. 公仔箱論壇+ j$ N3 H5 m% U+ S! k; z

. a- s9 h9 n& g8 a, S% S3 j& d# v, A公仔箱論壇Reason,
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7 ]8 {4 q7 Q2 c. K5.39.217.761. $18 costs on Item   = -$18
% s6 h' W9 ]+ t2 qtvb now,tvbnow,bttvb2. got $100 fake, (no income) , layout $79, = -$79公仔箱論壇4 n1 r7 O" M8 s( X! @  k/ K
3. pay back to $100 to that vendor whom exchange  fake $100 here -$100
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& H. {2 a& e5 A$ C" x$ l; J5.39.217.76Therefore, totally, 18+79+100 = 197   
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