In the first season, Fry is taken to and shown the edge of the universe, which looks onto a parallel universe. Fry turns to the Professor and asks, "Is there an infinite number of universes?," and the Professor responds, "No, only the 2."
However, later in "The Farnsworth Parabox" there appears to be an unlimited number of parallel universes, each contained in it's own box.
My question: how many universes exist in Futurama? Is there a set number or is there really an infinite number?
Please support your answers with quotes or links.