Right-click the chart, choose chart type and select one of the stacked chart
options. All 3 sets of data will be stacked.
Right-click the data series you want to be a line, choose chart type, then
choose Line Chart type. That will change the one data series to a line.
I know, it's not intuitive at all.

Signature
Echo [MS PPT MVP] http://www.echosvoice.com
What's new in PPT 2007? http://www.echosvoice.com/2007.htm
Fixing PowerPoint Annoyances http://www.oreilly.com/catalog/powerpointannoy/
> This should be an easy graph to produce but I'll be darned if I can figure
> out how to do it in power point.
[quoted text clipped - 9 lines]
>
> Thanks for any help.