Problem with showing full directory size at top level

[ReportHacker]

Hi,

I am trying to build a report that will just show the
top level directory's of a specific local NT server, but on the same line show the corresponding total file sizes (in bytes) of all the files in the sub directory's - how do I do this ?? I keep getting just the files in the top level
directory, or get all the directory's shown

Thanks a bunch !