The CPU alone is probably $25 in high volume, and these guys are not high volume. (Guesstrapolated from an iSupply teardown of a kindle fire.)

If you want $50 then you are looking at a Raspberry Pi grade CPU. Those are ok for getting data in and out of a H.264 decoder, but you would not mistake them for modern workstation performance. (But good news, they might announce shipping in 15 hours.)