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賺了多少元

一婦人用<font color="Navy">55元買了一花瓶</font>,以<font color="Navy">60元賣了出去</font>.<br />
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然後婦人覺得賺得不夠,又用<font color="Red">62元買回</font>花瓶,再以6<font color="Red">8元賣出</font>,<br />
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<font color="Magenta">問婦人賺了多少元?</font><br />
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答案:<font color="White">用$55元買了一花瓶,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;以60元賣了出去,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 再用60+自己拿多$2以62元買回花瓶,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 再以$68賣出,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 再減回自己拿多左$2,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 之前賺了$5減$2=$3,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 之前共賺$3,再以68元賣出,<br />
&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; 賺了$6,$6+$3=$9</font>