and am trying to summarize a column in the table using apex:variable but I am getting this error:<apex:variable var="totalBalance" value="{!0}"/>
<apex:pageBlockTable value="{!listOfCO}" var="co">
<apex:column value="{!co.Buyer_Name__c}"/>
<apex:column value="{!co.Total_Order__c}"/>
<apex:column value="{!co.Balance_to_Collect__c}">
<apex:variable var="totalBalance" value="{!totalBalance+co.Balance_to_Collect__c}"/>
</apex:column>
How do I accomplish this? Thanks!JohnError Error: You may specify either a ''value'' attribute or a body for the column component, but not both
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