The iconic iPad disappointed for the second quarter in a row, selling 14.1 million units vs. expectations of 14.5 million.
This served as a caution flag for investors. The iPad franchise's birth in 2010 kicked off the post-PC era, and it must succeed in order for Apple to be a part of it.
On Monday's conference call, Apple CEO Tim Cook didn't flinch one bit. He said we are heading for an iPad Christmas, and that the unit would return to growth in the quarter.
Is Tim Cook Crazy?
Let's break down the challenge from a mathematical standpoint.