public function saveTotalByCriteria(AmForms_ExportModel $export)
{
// Set submissions criteria
$params = array('limit' => null, 'formId' => $export->formId);
$criteria = craft()->amForms_submissions->getCriteria($params);
// Add export criteria
$this->_addExportCriteria($export, $criteria);
// Get total!
$export->totalCriteria = $criteria->total();
// Save export!
$this->saveExport($export);
}