I was just using the calculator to try to determine, for a particular set of lease parameters, how likely I’d be able to negotiate a deal at a certain MSRP and still be in my price range.

Another way you could think about this is: Given a MSRP, what is the dealer discount that I’d need to hit my desired payment? So for $50K, that might be 10%. For $55K, it might be 12%. And so on. This would make a very informative graph in my opinion. The X axis could be the MSRP of the vehicle, and the Y axis could be required dealer discount.

Another interesting graph might be a three dimensional one. The X axis is MSRP, the Y axis is dealer discount, and the Z axis (color?) would be payment or total lease cost.