假設原本有$10, 用$8買雞, 剩$2
8 I F' v2 f( G1 H$ V3 Dtvb now,tvbnow,bttvb之後$9賣出, $2+$9 = $11
; n% ]8 P* y' F( b" Yos.tvboxnow.com再用$10買雞, $11-$10 = $1tvb now,tvbnow,bttvb2 E8 S* V) b# a' e4 N, a' m' p5 y
又再以$11賣出, $1+$11 = $12公仔箱論壇1 M$ l% A a! W$ ?) r2 y0 Q
$12-$10 = 賺$2 |