RE: Force funnel chart to have fixed X Axis labels?

I am having problems formatting my values in the funnel chart.  As you can see from my screen cap above, they are currency and I want to show the percent of total like the old funnel chart did for me.  The problem is that I have to make the datatype of the member in my class a string to do this, but doing so seems to break the "weighted" visibility feature.  This somewhat makes sense to me since I'm sure it is expecting a numeric value to perform the weighting calculation.  

Is there any way to pass a format string to the value member of the funnel data class so I can go back to a numeric datatype in my class?