                          </p:column>

                                </p:row>  
                            </p:columnGroup>  

                        </p:dataTable>

                        <p:spacer height="30"/>

                        <p:dataTable id="returnCancelled"  value="#{commonReport.grnReturnCancel.bills}" var="b1"  
                                     rendered="#{commonReport.grnReturnCancel.bills.size()!=0}" >
                            <f:facet name="header">  
                         