I feel like this should be simple enough, but I cannot work this out.

I'm using 365.

I have some data. I would like the pie chart to show %, and the legend key to show the values.

Also, I'm wondering if it's possible to have a formula under the chart title that will automatically calculate the value (at the moment I have manually added it)?

Can someone please advise how I would do this? Example file attached.

Customer Analysis.xlsx