 <f:facet name="header">  
                    <h:outputLabel value="Remark"/>
                </f:facet> 
                <h:outputLabel value="C" rendered="#{bPh.cancelled==true}"/>
                <h:outputLabel value="R" rendered="#{bPh.refunded==true}"/>
            </p:column>

            <p:columnGroup type="footer">  
                <p:row>  
                    <p:column colspan="4" style="text-align:left" footerText="Totals:"/>  
                    <p:column  style=" text-align: right">
       