I'm sure there's a away. Can you post your packaged workbook or at least a sample of spreadsheet with dummy data?
As far as I have understood your problem,
You want to visualize the aggregate value of sales value Account Name wise and what is the aggregate sales value for the various System types that are contributing for the particular account name.
I have created a sample data for you and a dashboard associated with that data.
In the dashboard Account name wise sales is shown and if you click on any particular account type you will get a drill down for what are the system types are there in a particular account name.
PFA: Data , Dashboard
Dashboard: Please click on any Account Name to see the drill down for systems.
Is this what you are looking for??