Surface area (quantity)?

Greetings all,

I am looking for a way in an assembly file to find the total surface area of the quantity of an item.

As an example: using the parts list option in reports, I can choose the "Mass (item)" and the "Mass (Quantity)" fields which gives me the mass per item and the total mass (total occurences of that item).

In the same way, I can expose the "Surface_area" variable to get the per item surface area; is there a way to get the quantity surface area (total ocurrences of that item)? 


Thank you