breports using <b><a href="childsubreports.html">child 
          subreports</a></b> feature.</li>
        <li> Each subreport can have a unlimited number of sections of each type 
          (page headers,page footers,<b>group header an footers</b>)</li>
        <li>Grouping allow <b>sum,min,max,avg and std.desv</b>. operations.</li>
        <li> You can use groups as subreport headers and footers (<b>summary</b>)</li>
        <li> Multiple details are printed once for each record of the subreport's 
      