Define a summary field that computes the total of income.
use the summary field instead of Income in your chart.
Sort your records by user--this step is crucial
In your chart specify: "Show data points for groups of records when sorted"
It works. But, should it always be sorted first?
No matter what, I still greatly appreciate your reply.
Thanks a lot.
The elements of this chart evaluate just like summary fields in sub summary layout parts. If you do not sort the records into groups that correspond correctly with the bars/points/wedges of your chart, it doesn't work.
If you find that causes in issue, there are ways to chart related data where the relationship "groups" your data without needing to sort the individual records in what is now a related table.