Charting table detail and sum

I have a bar chart that displays the detail of a table with locations along the x-axis and number of employees on the y-axis. Is there any way to have the sum of all of the locations show as the final bar in the chart? (which would be the footer in the table)

Any help would be most appreciated,
Thanks

Sorry, "subtotals" are not directly supported in charts. But I'm not sure if you would really get the desired effect with a subtotal in charts. Since the individual employee groups share the same Y-axis as the total number of employees, you would most likely get many small bars and one long bar showing the total number of employees.
One alternative way is to add a second chart which just shows the total number of employees.

-- Robert|||Just wondering if total chart bar are still not supported ? I need that also...