Method getLastVendorTicket

public static function getLastVendorTicket($vendorId, $unitId, $sectionId)
{
    $db = Factory::getDBO();
    $query = ' SELECT ticket_id FROM #__phocacart_cart_multiple' . ' WHERE vendor_id = ' . (int) $vendorId . ' AND unit_id = ' . (int) $unitId . ' AND section_id = ' . (int) $sectionId . ' ORDER BY ticket_id DESC';
    $db->setQuery($query);
    $result = $db->loadResult();
    return (int) $result;
}