Actually, after recalculation, you are correct. Apparently the mass of a telephone varies non-linearly to the cars that Rigby owns.
Dear Arceus , I have never in my existence beheld a conversation in which it's directly-proportional subjects directed themselves into polar opposite directions to lead to arbitrary issues such as this! It is agreed that the graphical analysis of trees vs. telephones give an eliptical curve (If we were to take the integral of such, we'd get a hyperbole, but that is mere conjecture), but we have yet to consider the banter around how the analytical proponents of the mass vs. gravity on the third axis affects the entirety of the situation. I merely stand here to express my condolences that none of you have even taken that into consideration and that this entire topic needs to be redirected into the germane path of sane and logical sense.