解答:$55 賣了$60 = 赚了5
$ t" I, E1 E6 P7 G! Utvb now,tvbnow,bttvb 又以$62買回花瓶($62 - $5 = 花瓶的本钱= $57)
; b+ }( K; A) gtvb now,tvbnow,bttvb 再以$68賣出, $68 - $57= $11
* r1 I2 Z3 z1 x# g+ {# wtvb now,tvbnow,bttvb $11tvb now,tvbnow,bttvb/ O8 q# z: J0 _" j7 |1 W6 `! `+ V
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