Without even looking at the link, let me guess -- iSuppli? They're notoriously inaccurate, don't account for anything that enters into real-world manufacturing & distribution costs, guess at most of what they claim are component costs (since they don't have access to the actual components), and on, and on, and on...
I work for an OEM (similar to Apple, we design and manufacture our own hardware and the software that runs on it), and our best margin, after amortizing development costs over five years, is on the order of 34%. This is for equipment that's been in production for over ten years!
Realistically, true gross margin for the iPhone is more like 17-25%, and net is a good bit tighter. I'd be surprised if the actual net is more than $75 a unit, but knowing Apple's muddying of their 10Q's and annual statements, will still be darn near impossible to discern.
It's Business Accounting 101, and either iSuppli either doesn't understand it, or ignores it intentionally (more likely, because they get quoted by national press that way..

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