Help With Query To Check All Open PO's

Hello All  

I have written a query to check all open purchase order for two suppliers by their supplier code

It works, but I have a problem and I can't fix

When I run it. It checks for all open rows on the purchase order and displays it as open PO's

My problem is, If there are 10 rows open in a single PO eg: 344160 with

4 rows with delivery date as 05/02/15

5 rows with delivery date as 20/02/15

1 row with delivery date as 15/03/2015

I need it to add the row total for those dates as display a total due that date

Should display result in one row and not as 4; 5  and 1 row with the same PO no

The query I have written is below

SELECT T0.[DocNum},
T0.[CardCode],
T0.[CardName],
T0.[DocDate],
T1.[ShipDate],
T1.[TotalSumSy],
T0.[DocRate],
T0.[U_ShipType]
FROM OPOR T0 INNER JOIN POR1 ON T0.DocEntry = T1.DocEntry
WHERE T0.[CardCode] between 'S1070' and 'S1075' and T1.[LineStatus] = 'O'
GROUP BY T0.[DocNum],
T0.[CardCode],
T0.[CardName],
T0.[DocDate],
T1.[ShipDate],
T1.[TotalSumSy],
T0.[DocRate],
T0.[U_ShipType]
ORDER BY T1.[ShipDate]

Thanks and Regards

Rahul