No, but I didn't say everything I was thinking in the first post.
But I can't read minds!
The question by its nature is political
Plus you have to consider the start-up costs, Apple has many lines already in China, it costs a lot of start up capital (the most expensive) to bring up a brand new isolated line in Texas.
Apple doesn't own any of the production lines though. They're owned by companies such as Hon Hai Precision, Quantas, and others that obtain Apple's production contracts (if not the engineering as well that sits inside Apple's Industrial Designs).
So that "startup capital", is borne by the contractors, not Apple.
It's not worth arguing. I'll just say that I've worked in these kinds of production lines (engineering side) for 20 years. Just looking at the engineering resources, cost here about $150-$200k/year. Over there? Less than half that. You have to include overhead by the way, managers, floor space, regulatory costs, it all adds up.
Overall, the costs do add up. But what you've listed doesn't include everything. Not even close in fact.
For example, you've skipped the impact incurred due to things such as the losses due to defective units and a lack of proper QC. It's possible to get better standards, such as placing you're own people on their lines as QC inspectors with more than just a Hi-POT test, but that adds to the cost. There's also the cost that results in the slower ability to rectify production issues (cheap parts that no one in management will allow to be pulled and discarded in either company), that eats into support hours, or an increase in defect percentages that must be eaten by the primary company.
NRE's may not differ as much as expected between nations, relative to the number of units produced.
FWIW, I also have electronic manufacturing experience, though it may not be the same as yours (started in defense, moved to enterprise/industrial; some consumer, but not nearly as much as the previous two).
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Designed and assembled in the U.S.
With the new Mac Pro, we assemble the entire product and machine several of its high-precision components in the United States.
There are some components used in it that are produced in the US based on the articles that covered the nMP being produced in TX, but there's no statement as to how much in terms of percentage.
But given the rules involved for a product to qualify as "Made in USA", it's not enough to meet the regulations (a tad vague, and there are exceptions, such as the content of automobiles or textiles), but in general, content as well as assembly must be primarily of US origin.