0-18(buy)=-18公仔箱論壇, A2 a9 k& n( \- s) a
& S b% R2 s/ ]& p0 K. L7 W& ~
100(paid)-79(change)=21(sold for)公仔箱論壇1 ?' W6 J# V9 m7 C, W$ d* T, e/ E
6 A0 H" ], p; u1 k6 M
-18+21=3(profit)
" C3 {/ h; {8 P3 E7 U2 c公仔箱論壇. J9 k6 `6 C0 I6 j, C
-100(fake)8 x2 M0 D/ w4 U$ O* H
6 p! f3 H8 f6 |$ ~' I D
-100+3= -97 |