Basically you're asking how much would it cost to make an iPhone from scratch, assuming we start with a hunter/gatherer level civilization. That's a pretty useless value, because that civilization cost is shared by many other things and amortized over a long history.
Prices, therefore, are only meaningful in a relative context, assuming a baseline, which is what this cost estimate is. And that baseline changes, which is why 1GB now is so cheap while 40 years ago it was very, very expensive.
Prices, therefore, are only meaningful in a relative context, assuming a baseline, which is what this cost estimate is. And that baseline changes, which is why 1GB now is so cheap while 40 years ago it was very, very expensive.