The main thing those numbers are telling you is that Foxconn is really big.

I think your link is also relying on data which is several years old, this is more recent and listing average hourly wages of $3.60 in China:

https://www.cnbc.com/2017/02/27/chinese-wages-rise-made-in-c...

But that's still less than a third of $100/day.

The real question is whether the required number of employees is off too, which if the numbers are from years ago and the theory that automation is increasing is true then it would be, and then as you say, how that plays out in terms of labor per unit.

In what world do you pay a skilled American $12.50/hr? And that is before considering benefits.

You’re absolutely right, I was being unrealistically conservative. In reality that many workers would almost certainly unionize and average labor costs could easily be $250-$300 a day or more.