I would like to compare two data sets on the same chart using stacked bars.
The data ranges are different by several orders of magnitude in one case, so
I would like to use two axes. My x-axis is time in months. I would like to
have both data sets displayed against each month. I cannot find a
appropriate chart in PowerPoint's custom chart nor can I find instructions on
how to create a custom chart. Anyone have an idea? Maybe Excel is the way
to go.