<p:summaryRow>
        <p:column colspan="10" style="text-align:right">
            <h:outputText value="Sum net price:" />
        </p:column>
        <p:column>
            <h:outputText value="#{myController.sumNetPrice}" />

        </p:column>
        <p:column colspan="2" style="text-align:right">
            <h:outputText value="Sum gross price:" />
        </p:column>
        <p:column>
            <h:outputText value="#{myController.sumGrossPrice}" />

        </p:column>
        </p:summaryRow>