Here is my scenario:
What I would like to show in a Bar Chart are the following:
1. If a person selects on Product, lets say A, a bar graph of how many they have. This is easy.
2. If a person selects 2 Products, lets say A and B, a bar graph that shows the total number of A and the total number of B only if A exists.
So basically the second product selected depends on the first product selected.
Does this make sense?