某厂三种产品的产量情况如表1所示。表1试分析出厂价格和产量的变动对总产值的影响。

<br />计算结果如表2所示。<br /><span style='text-align:center;display:block'>表2</span><br /><span style='text-align:center;display:block'><img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/19f611d2-9963-4080-91b8-65cb6f3db072.jpg" width="480" height="128" /></span><br /><img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/896866fd-6397-4591-a197-424d414dcdf6.jpg" width="300" height="54" /><br />Σp₁q₁-Σp₀q₀=21700元<br /><img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/dd2bd323-57fe-4c1b-baac-4f4852914e1a.jpg" width="287" height="54" /><br />Σp₀q₁-Σp₀q₀=8800（元）。<br /><img src="http://admintk.100xuexi.com/UpLoadImage/2013-05-07/7d3fb4c9-aedb-4af1-aad1-9b6abde374f2.jpg" width="323" height="51" /><br />Σp₁q₁-Σp₀q₁=12900元