If you can set this up to work from the context of a related table where you have one record for each sub summary part, you could use a horizontal portal technique to list the records horizontally. In a horizontal portal set up, you set up a row of one row portals. Either these one row portals are set up to show an initial row of 1 in the first portal, an initial row of 2 in the next... or you can set up filters on the portals that select for specific related records.
This row of data might also be a single calculation field with tab characters (Char ( 9) ) separating each value from a related table. Both ExecuteSQL or List might be used to produce such a single row of data. (In the appearance tab of the Inspector, you can specify tab stops for this field.)