Label in center of doughnut chart

[teccheck]

I'd like to make a label with the total value of a doughnut chart in the center of the chart. Can someone give me a tip how to make something like this?

[JoshPJackson]

@TecCheck did you find a way to achieve this?

[timjohnson6]

this looks like a great start in adding this functionality http://jsfiddle.net/kdvuxbtj/