Sum amount of fees for students that paid all fees assigned

SELECT
                     SUM(FsPaid.Amount) AS totalfees
       FROM         FsPrepaidFees FsPre INNER JOIN
                     Students S ON FsPre.STCode = S.STCode INNER JOIN
                     FsFeesClass Fs ON Fs.FNCLCode = FsPre.FNCLCode AND Fs.ClassFeesCode = FsPre.ClassFeesCode INNER JOIN
                     FsFees  FsType ON FsType Fs.FNCLCode = FsType.FNCLCode AND Fs.feesCode = FsType.feesCode INNER JOIN
                     FsPaidFees FsPaid ON FsPre.FNCLCode = FsPaid.FNCLCode AND FsPre.prepaidCode = FsPaid.prepaidFeesCode INNER JOIN
                     Schools ON S.SCCode = Schools.SCCode AND S.STShift = Schools.SCShift INNER JOIN
                     EducationLevels INNER JOIN
                     Classes ON EducationLevels.EDCatCode = Classes.EDCatCode AND EducationLevels.EDLVLCode = Classes.EDLVLCode INNER JOIN
                     EducationCategories ON EducationLevels.EDCatCode = EducationCategories.EDCatCode ON S.CLSCode = Classes.CLSCode
       WHERE
         (dbo.S.sccode = 3)
         AND   (FsType.FNCLCode = 2) AND (FsType.feesType = 0) AND (FsPaid.flgPaid =  1) AND (FsPre.SCYear = 7) and
         (select Fs1.amount  from FsFeesClass Fs1
            group by Fs1.amount
            having Fs1.amount = SUM(FsPaid.Amount))