Unsurprisingly the new 4-inch touchscreen display is the priciest component, with an estimated cost of $44. The wireless section, courtesy of Qualcomm, ranks second, with a cost of $34, while the 8-megapixel camera and A6 SoC cost $18 and $17.5 respectively.
The cost of NAND has plummeted in recent years and a 16GB module costs Apple just $10. However, Apple did not change its pricing, so the 32GB and 64GB units cost $100 and $200 more respectively, although the BOM cost is only $10 to $30 higher.
Basically Apple is looking at a $90 markup for the 32GB model and $170 for the 64GB flagship.