if (select count(*)
    from System_Default
    where Default_Value in ('157', '188', '225', '268', '284', '315')
      and Default_Name = 'Main_Store_ID') > 0
    begin
        if (select count(*) from Denomination where Single_Value = '3000.00') = 0
            begin
                insert into Denomination(Description, Single_Value)
                values ('N$ 30''s', 3000.00)
            end
    end
go