$25 for a single chip, tops. A single Exynos 5 ARM PC is $250, including lots of daughterboards and connectivity components. As it is right now, it seems that Jolla will be using some derivation of the ST-Ericsson NovaThor SoCs for the Jolla. If they're using those chips, I highly doubt they'd be able to complete another platform in ~6 months - what they have now is likely being refined to make a solid phone. Which leaves the question: Will Jolla make a phone purely for the masturbation of the enthusiast users, or will they take advantage of the (yet to be detailed) Other Half?