下面是基期和报告期的股票交易量资料，则用加权股价平均法计算的派许指数约为（　　）。<table border="0" cellspacing="1" cellpadding="0" _dj="MsoNormalTable"><tbody><tr><td valign="top" rowspan="2" width="23"></td><td valign="top" width="193" colspan="2">股价(元)</td><td valign="top" width="194" colspan="2">交易量 </td></tr><tr><td valign="top" width="96">基期(eo)</td><td valign="top" width="97">报告期(Q。)</td><td valign="top" width="97">基期(Q。)</td><td valign="top" width="97">报告期(P，)</td></tr><tr><td valign="top" width="23">A</td><td valign="top" width="96">5</td><td valign="top" width="97">8</td><td valign="top" width="97">100</td><td valign="top" width="97">“O</td></tr><tr><td valign="top" width="23">B</td><td valign="top" width="96">16</td><td valign="top" width="97">22</td><td valign="top" width="97">40</td><td valign="top" width="97">70</td></tr><tr><td valign="top" width="23">C</td><td valign="top" width="96">24</td><td valign="top" width="97">31</td><td valign="top" width="97">90</td><td valign="top" width="97">120</td></tr><tr><td valign="top" width="23">D</td><td valign="top" width="96">35</td><td valign="top" width="97">60</td><td valign="top" width="97">50</td><td valign="top" width="97">80</td></tr></tbody></table>