How to show header data in one row & Item data in another row in SAP WEBI

Hello All,

I am designing a webi report where we need show Header data in one row followed by its item(s) data. Below you can find sample report o/p. First now is Header Columns & Second Row is Item data columns.

Note: If there is no line item for a PO number then next PO should be displayed.

Let me know if there is any standard function or logic to achieve this.

Regards,

Venu Gopal