$50假要比返$50人= -$50tvb now,tvbnow,bttvb! t# p) A# u9 R) j8 v+ J
成本=比出左= -$15tvb now,tvbnow,bttvb( C2 a& e4 z7 x. F0 g# B! I
賣出$21-成本$15= $6
( A- \* U0 ] w/ j; @4 o4 y" Ktvb now,tvbnow,bttvb回$29比個pk= -$295.39.217.77! Z- T( u% x" c2 b! j2 g! d6 W
唔係應該$88咩... |