Cost vs. Retail Price of each phone model

[ghettomotto]

I saw this and I thought it's quite interesting. 

Basically, a comparison of the Production Cost vs. Retail Price (USD) vs. Profit Margin of some popular phone models.

Interesting...seems like iPhones' production costs have increased quite dramatically in recent years. Not like they've been adding really new and radical features, so I wonder where it's coming from.