Two levels bar

Hi guys.

I need to make a weekly report that involves some charts, and until now I was using presentation softwares alone to do the job. Obviously to do the charts take a lot of time, so I want to make it all automatically using Excel.

Making a lot story short, I need to make in Excel what I'm sending attached.

I run a number of tests on a software, and I want the chart to overlap in one bar both the total itens tested, and the itens tested withou errors.

I've been trying to do this since yesterday morning, but with no success at all.

Thanks in advance.