understanding phpexcel RATE function
<p>The Formula call for variables.  I've look all over and can't find what these variables are and what values they're supposed to represent.</p>

<pre><code>RATE($nper, $pmt, $pv, $fv = 0.0, $type = 0, $guess = 0.1)
</code></pre>

<p>Is anyone familiar with this function?  Do you know what values the variables are meant to represent?</p>
