The main trick is to adjust the series overlap
in more detail:
- create a 2D clustered column with 2 series (with and without discount)
- set the transparency on the "without discount" series to 50%
- right click on either series and set the gap width to 35% (making the columns wider) and the overlap to 60%
- you will have to set the colours for each column manually. Click twice on a column to select the single data point not the series, and choose a solid fill colour. Apply the same colour to both the "with" and "without" discount points ("without discount" should retain its 50% transparency).
- once you have created a chart in the format you like, you can apply it to other similar charts using copy > paste special > paste format
if you need to create lots of similar charts, you can copy and paste repeatedly and adjust the data sources, or use a macro if the data are in a consistent structure (eg successive rows or columns)
or, you could use a macro that applies the above steps to every chart in your worksheet:
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