Apple just dropped its 4th quarter earnings a few moments ago, revealing that the folks in Cupertino raked in $42.1 billion in revenue and $8.5 billion in pure profit -- more than enough to take care what it might owe in back taxes. More interestingly, the company moved a total of 39.3 million iPhones over the past three months, along with 12.3 million iPads and 5.5 million Macs. Word that Apple's mobile business had a bang-up three months is hardly a shock - a record-breaking 10 million iPhone 6/6 Pluses were sold over its first weekend, which CEO Tim Cook said beat all previous milestones "by a large margin". Here's the thing though: iPad sales didn't just dip from last quarter, they dipped year-over-year, too. In fact, the number of iPads Apple has moved this time around was the lowest since the company started reporting tablet sales separately in 2012.