Creating Mixed Charts in Numbers

I'm trying to create a chart in Numbers (4.0), using 3 data series.

I'd like to use 2 of the data series as a stacked column, and the 3rd data series as a line. I see there's a 2D Mixed, but it seems like it only allows mixing for 2 data series.

Is there a way to do this for 3 data series? Thanks.