UFN_INSTALLMENTWRITEOFF_GETAMOUNTINCURRENCY

        CREATE function dbo.UFN_INSTALLMENTWRITEOFF_GETAMOUNTINCURRENCY
        (
            @INSTALLMENTWRITEOFFID uniqueidentifier,
            @CURRENCYID uniqueidentifier
        )
        returns money
        as
        begin
        declare @AMOUNT money = 0;

        if (@CURRENCYID is null) or (@CURRENCYID = dbo.UFN_CURRENCY_GETORGANIZATIONCURRENCY())
        begin
            select
                @AMOUNT = ORGANIZATIONAMOUNT
            from
                dbo.INSTALLMENTWRITEOFF
            where
                WRITEOFFID = @INSTALLMENTWRITEOFFID;
        end
        else
        begin
            declare @RECORDBASECURRENCYID uniqueidentifier;
            declare @RECORDDATE datetime;

            select
                @RECORDBASECURRENCYID = ISW.BASECURRENCYID,
                @RECORDDATE = DATEADDED
            from
                dbo.INSTALLMENTWRITEOFF as IW
                inner join INSTALLMENTSPLITWRITEOFF ISW
                    on IW.WRITEOFFID = ISW.WRITEOFFID
            where
                ID = @INSTALLMENTWRITEOFFID;

            if @CURRENCYID = @RECORDBASECURRENCYID
            begin
                select
                    @AMOUNT = AMOUNT
                from
                    dbo.INSTALLMENTWRITEOFF
                where
                    WRITEOFFID = @INSTALLMENTWRITEOFFID;
            end
            else
            begin
                declare @CURRENCYEXCHANGERATEID uniqueidentifier;

                set @CURRENCYEXCHANGERATEID = dbo.UFN_CURRENCYEXCHANGERATE_GETLATESTINCLUDEEXPIRED(dbo.UFN_CURRENCY_GETORGANIZATIONCURRENCY(), @CURRENCYID, @RECORDDATE, 1, null);
                if (@CURRENCYEXCHANGERATEID is not null)
                begin
                    select
                        @AMOUNT = dbo.UFN_CURRENCY_CONVERT(ORGANIZATIONAMOUNT, @CURRENCYEXCHANGERATEID)
                    from
                        dbo.INSTALLMENTWRITEOFF
                    where
                        WRITEOFFID = @INSTALLMENTWRITEOFFID;
                end
                else
                begin
                    set @CURRENCYEXCHANGERATEID = dbo.UFN_CURRENCYEXCHANGERATE_GETLATESTINCLUDEEXPIRED(@CURRENCYID, dbo.UFN_CURRENCY_GETORGANIZATIONCURRENCY(), @RECORDDATE, 1, null);

                    select
                        @AMOUNT = dbo.UFN_CURRENCY_CONVERTINVERSE(ORGANIZATIONAMOUNT, @CURRENCYEXCHANGERATEID)
                    from
                        dbo.INSTALLMENTWRITEOFF
                    where
                        WRITEOFFID = @INSTALLMENTWRITEOFFID;
                end
            end
        end    

        return @AMOUNT;
    end