Wonder what happens when you factor in research and development, shipping costs, customer care costs, employee training, store stocking, warehousing, warrantee exchanges, and ... or are these all free to Apple?
No, but they're not huge on a per phone basis when you're talking about selling ten million of them.
Obviously, normal cell phone manufacturers wouldn't have to worry about the store-related stuff, since they're just a supplier.
R&D is one time across the board and much cheaper with the second phone. If it even cost over a couple million dollars for the little that was changed, I'd be surprised. Sell only five million phones and it adds less than a dollar each.
Construction (in China), boxing and shipping is a per unit cost. Figure $3-5 each.
The App Store will also finance a lot, for Apple doing very little in return.