It's reasonable to assert that about 40% of the sales came from domestic sales. Historically Apples international revenue has floated around 40% (i.e domestic

It's reasonable to assert that about 40% of the sales came from domestic sales. Historically Apples international revenue has floated around 40% (i.e domestic at around 60% by revenue). In recent quarters these figures have reversed due to international iPhone penetration. (By revenue iPhone makes up around 43% of Apple's business with the iPad and Mac hardware roughly on par at 19%/20% respectively. iPhone significantly outsells all other business models by units and revenue.) Apple's last quarterly results(Q4 2011) indicated 63% international revenue over all business units. Leaving 37% for domestic revenue. Applying this figure directly indicates 4.11M sales alone in the last quarter, or 9.25M over the three quarters stated, which is reasonably consistent with Gruber's math. If we keep in mind that the iPhone is skewing the revenue split to international purchases we can assert that 40% is indeed being conservative. Reference: Apple Q4 2011 earnings call: http://www.macrumors.com/2011/10/18/apple-records-q4-2011-earnings-of-6-6b-on-28-3b-in-revenue-tops-100-billion-in-sales-for-fiscal-2011/ http://www.macrumors.com/2011/10/18/apple-records-q4-2011-ea...