Seriously? How is it even possible. Who would need a nonsense sales data based not on exact payments but on theoretical full prices listed in store?
I never run the reports included with CS-Cart, because I have real accounting software for that, but the reports I have configured in store software all calculate sales data based on the order total. There's one that just reports the sales from my own state (taxable).
Look at what's available when you Edit the report you are viewing. The “value to display” might be set to “Product costs”. Change it to “Order total”. You can create and save a wide variety of reports about your store data if you want to.
So basically there is no way to build a proper report for individual product popularity.
Due to there is no data for how much exact product have sold.