Complex Stacked Cluster with Secondary Axis

I am trying to create a stacked cluster chart, with a secondary axis to show the second data points. However, I am stuck. I cannot figure out how to place the Opps data in the chart, show a secondary axis, yet still maintain monthly integrity. (Please see attached.)

I'm using Excel 2013 and have viewed the http://peltiertech.com/WordPress/clu...mn-bar-charts/ link, but it is not helpful.

What am I missing in order to have:

Groups
Opps
Revenue
Months

Many thanks!