                    </f:facet>
                    <p:outputLabel value="#{n+1}"/>
                </p:column>
                <p:column  >
                    <f:facet name="header">
                        <h:outputLabel value="GRN No"/>
                    </f:facet>
                    <p:outputLabel value="#{b.referenceBill.deptId}"/>
                </p:column>
                <p:column  >
                    <f:facet name="header">
                        <h:outputLabel value="Invoice No"/>
         