Please can someone help me with a special pie chart that I need to prepare.
The chart will be used as a visual indicator of a sales mix and will be
updated over time to show trends.

To explain my idea, I will use cars as the example:

Let's say that we sell 4 types of car:

FORD
TOYOTA
BMW
MERCEDES

Overall, I want the pie to represent the total sales value whilst showing
the split of sales (% or value label) by make of car, eg FORD etc.
In these large slices of the pie, I would like to use a different colour
(for each type of car)

However, and here (for me, anyway) comes the difficult bit..

Let's say that within each car range, I want to show the different colours
that were sold.
So, for each segment of the pie (percentage of FORD etc.) I would like to
sub-divide into colours that were sold, eg. Ocean Blue, Steel Grey etc..
This would then show me clearly:
A) Which make of car is selling best
And
B) Which colour - within each make - is most popular


I would be very happy if I could achieve the above. But if it were possible,
I would also like to arrange each of the sub-divisions for colour from
largest to smallest within each large (make of car) section of the pie

I have been fairly successful in creating various charts in excel over the
years, but pie charts are not my speciality, so any help or suggestions
would be very much appreciated.

Many thanks,
Paul (UK)