It doesn't work and i think something is wrong on the question.
What I did to solve this is creating a clustered bar chart visualization and made this configuration :
Axis : Product
Value : Total sales
Color Saturation : Total Units
(I added Year on filters and i filtered on 2015)
You have to change the data colors and put White color on minimum (to have the same visualization)
Once it's done, you can re-publish the report and pin the tile on your dashboard
For the second question : What is the total sales for Germany in 2014?
You can do it easily on dashboard view