='Top 5 ' & GetCurrentField(xgroup)
& ' by Total Sales:
' & concat(
$(=GetCurrentField(xgroup)) ), xgroup)
,', ' & chr(13))
The first line in the expression defines the first line that will appear in the text object and it is a title for the data. It uses the GetCurrentField function to get the current value of the cycle group and use it in the title.
Top 5 salesperson by Total Sales:
The text objects are most useful and interesting, I think, when several of these expressions are used together in the same object along with text that explains, identifies, and provides meaning.