Hi,
Try this query:
SELECT T1.[ItemCode], T0.[CardCode], T0.[DocNum],min(T1.[Price]) FROM OQUT T0 INNER JOIN QUT1 T1 ON T0.DocEntry = T1.DocEntry WHERE T1.[ItemCode] = '02498401' GROUP BY T1.[ItemCode], T0.[CardCode], T0.[DocNum], T1.[Price] HAVING min(T1.[Price]) <500 ORDER BY T1.[Price]
Thanks & Regards,
Nagarajan