假設原本有$10, 用$8買雞, 剩$2tvb now,tvbnow,bttvb6 W/ S0 }, K* F% P A3 h) g5 }7 H
之後$9賣出, $2+$9 = $115.39.217.76) R, U. G7 p t1 l
再用$10買雞, $11-$10 = $1
0 N3 L; r! {) y% Y# f7 {& [$ htvb now,tvbnow,bttvb又再以$11賣出, $1+$11 = $12
- D3 t0 j+ [) K( v3 D6 S$ `tvb now,tvbnow,bttvb$12-$10 = 賺$2 |