Take the back-of-the-envelope scribblings of a tech blogger with the appropriate degree of skepticism, but according to this breakdown of what the build-of-materials (BOM) cost of the upcoming iPad mini could be, Apple will sell their 7.85-inch tablet for $299 when it debuts later this year… and still make over $100 in profit on each unit sold.

One of the little secrets that has made Apple the most profitable company in tech is their ability to achieve high margins on their gizmos, but the new MacBook Airs might set a record even for Apple: according to analysts who have estimated its bill of materials, the entry-level, 11.6-inch MacBook Air costs only $718 to make.

That means that for every 11.6-inch MacBook Air Apple sells, they make $281, a profit margin of 28.1%. That’s for the 64GB: buy yourself a 128GB MacBook Air and the profit margin jumps to 34%. Buy a 128GB 13.3-inch MacBook Air and that margin nudges forward again, this time to 37%.

Those margins are excellent, even comparatively: Apple, on average, achieves a profit margin of just 20% on the rest of their laptops.