Hi Ketki,
Try Below Query
SELECT T0.[DocNum], T0.[DocDate], T0.[CardName],t1.U_Part_No,t1.Dscription, T2.FrgnName as 'Part No.', T1.GrossBuyPr as 'LPP', t1.Quantity,T1.PriceBefDi as 'Unitprice',
(SELECT U0.[CalcPrice] FROM OINM U0 WHERE U0.[TransType] in (18,20) and T1.[ItemCode]=U0.[ItemCode] and U0.[DocDate] =(Select Max(DocDate) from oinm where U0.[ItemCode]=ItemCode))as 'price1' FROM OINV T0 INNER JOIN INV1 T1 ON T0.DocEntry = T1.DocEntry INNER JOIN OITM T2 ON T1.ItemCode = T2.ItemCode where T0.[DocDate]='2013-11-27' and T1.ItemCode='FBT03511'
regards,
Raviraj