> Apple's P/E ratio is roughly 29. So, if you assume that the $15bn is pretty much all profit (for simplicity here remember), then the value of that for AAPL is

> Apple's P/E ratio is roughly 29. So, if you assume that the $15bn is pretty much all profit (for simplicity here remember), then the value of that for AAPL is roughly $35bn in market cap. Not sure where you get $35B from. 15B * 29 = $435B