假設原本有$10, 用$8買雞, 剩$2tvboxnow.com- y5 {& J. ^! z: ]) ?1 ~2 w3 h
之後$9賣出, $2+$9 = $11
- I; Z/ e/ U( ]; q9 @! @tvboxnow.com再用$10買雞, $11-$10 = $1
: g( ?3 c. o; ^9 V7 x4 etvb now,tvbnow,bttvb又再以$11賣出, $1+$11 = $12
! I2 ~' }' d _! I) K4 ?tvboxnow.com$12-$10 = 賺$2 |