Transaction Totals without tax?

Hi,

I'm trying to create a script that totals up all sales orders before taxes within this fiscal quarter. I can't seem to find the right search column to get the total without taxes. Here's a snippet of my code:

 var statusFilter = new Array();  statusFilter[0] = 'SalesOrd:C';    var filters = new Array();  filters[0] = new nlobjSearchFilter('name', null, 'is', customerInternalID, null);  filters[1] = new nlobjSearchFilter('trandate', null, 'within', 'thisfiscalquarter');  filters[2] = new nlobjSearchFilter('status', null, 'noneof', statusFilter, null);  filters[3] = new nlobjSearchFilter('mainline', null, 'is', 'T');    var columns = new Array();  columns[0] = new nlobjSearchColumn('amount');    //calculate sales order total  var salesOrderResults = nlapiSearchRecord('salesorder', null, filters, columns);    //make a grand total  if(salesOrderResults != null){   for (var i = 0; i < salesOrderResults.length; i++)   {    SOtotal = parseFloat(SOtotal) + parseFloat(salesOrderResults[i].getValue('amount'));   }   }    alert("(debug) Sales: "+SOtotal);