public function updateCell($row, $col, $inputValue, $key, $wkshtId = 'default')
    {
        $cell = 'R'.$row.'C'.$col;

        $query = new Zend_Gdata_Spreadsheets_CellQuery();
        $query->setSpreadsheetKey($key);
        $query->setWorksheetId($wkshtId);
        $query->setCellId($cell);

        $entry = $this->getCellEntry($query);
        $entry->setCell(new Zend_Gdata_Spreadsheets_Extension_Cell(null, $row, $col, $inputValue));
        $response = $entry->save();
        return $response;
    }