Index column in matrix table

Hello!

I have a question and I hope you can help me solve it. 

Is it possible to add an order column (like a index column) in a matrix table? To get a result like this image 

In this case, the zones are ordered by descending sales, so the south zone is number 1 and so on. Sales and zones are independent tables in the model. I tried the function of adding an index column in power query but it does not respect the order of the zones by sales and when adding the index field in the matrix rows it is not possible to see the zones :((

I share the .pbix and I expect you can help me, thank you

https://drive.google.com/file/d/1Ks1m14wcxkKNbIV7dYtlG4Byo_SAl2Ci/view?usp=sharing