private void evalSum(cReportFormulaInt fint)
{
if (fint.getVariables().item(C_SUM) == null)
{
fint.getVariables().add(null, C_SUM).setValue(0);
}
cReportVariable w_item = fint.getVariables().item(C_SUM);
// the sum function is for numbers
//
w_item.setValue(Convert.ToDouble(w_item.getValue())
+ pGetNumber(m_report.getValue(fint.getParameters().item(0).getValue(), true)));
}