Unable To Access The Total Value Of Tbextendedgridview

<?php

 &#036;this-&gt;widget('bootstrap.widgets.TbExtendedGridView', array(


'dataProvider'=&gt;VehicleLogbookTbl::model()-&gt;sqlqueries(),


'enablePagination' =&gt; false,





'columns'=&gt;array(


array(


'header'=&gt;'S.#',


        'class'=&gt;'IndexColumn',


    ),            


'dated',


'iniReading',


'finalReading',


		 array(


'header'=&gt;'KM',


'value'=&gt;'&#036;KMS = &#036;data-&gt;finalReading-&#036;data-&gt;iniReading',

),

	 array(


'header'=&gt;'Donor',


'value'=&gt;'(&#036;data-&gt;project&#33;=null) ? &#036;data-&gt;project-&gt;donor : null',

),

 array(


'header'=&gt;'Project / Employee',


'value'=&gt;'(&#036;data-&gt;project&#33;=null) ? &#036;data-&gt;project-&gt;project_acronym : null',

),

    'fuelInLtr',


	'fuelAmount',


	'destination',


	'purpose',


	array(


    'name'=&gt;'fuelAmount',


    'footer'=&gt;&quot;Total: &quot;.&#036;data-&gt;fetchTotalfuelAmount(&#036;data-&gt;search()-&gt;getKeys()),


   ),


),


'extendedSummary' =&gt; array(


    'columns' =&gt; array(


        'fuelInLtr' =&gt; array('label'=&gt;'Total fuelInLtr', 'class'=&gt;'TbSumOperation'),


        'fuelAmount' =&gt; array('label'=&gt;'Total fuelAmount', 'class'=&gt;'TbSumOperation'),


		'KM' =&gt; array('label'=&gt;'Total KM', 'class'=&gt;'TbSumOperation'),


		'iniReading' =&gt; array('label'=&gt;'Total iniReading', 'class'=&gt;'TbSumOperation'),


		'footer'=&gt;'Total123',


    )


),





'extendedSummaryOptions' =&gt; array(


    'class' =&gt; 'well pull-right',


    'style' =&gt; 'width:300px',


),





));

?>

I have this code for extended cgridview.its working fine and its output is ok. but I want to echo total fuel amount on somewhere other in the same view in yii. plz tell me howz it possible?

You can use javascript to echo fuel