https://www.cnbc.com/2017/09/26/how-much-apple-iphone-8-costs-to-make-and-how-much-they-are-sold-for.html

Apple's iPhone 8 Plus is one of the company's most expensive smartphones to make to date, but price hikes are likely to help maintain a healthy margin, according to analysis.

The bill of materials (BOM) cost for the 5.5-inch iPhone 8 Plus with 64 gigabyte memory came in at $288.08, IHS Markit revealed in a teardown of the device. This was higher than the $277.66 cost of the iPhone 7 Plus. But the price for the iPhone 8 Plus is $799, which is $30 higher than its predecessor.