Relatinship b/w vbeln(sales doc ) and price per unit

Hi all ,

May i know any table which has a relation between sales document (vbeln) and

kbetr(price per unit) , kwert (total price ).

I have to find these two and add those for all the line items .

I got a table konv , but it doesnt have vbeln(sales documnet) .

How could i form a relation ship between vbeln and (kbetr, kwert).

Regards

Raj