Report: printing details inside table

Hi,
I'm developing a report, where a list of sales lines is printed. I also have a table, that acts as addiitonal data for a sales line. Now my challenge is to print the sales line and with the additional data. to Ilustrate better, i want:

--> saleslineA
--> additional data
-->salesLineB
--> additional data.

additional data is actually a table containing multiple items for the sales line.

is there any way to create a "details" row for the additional data below sales line.