Generally the manufacturing and R&D costs dont get disclosed to the general public, but usually the excuse for setting prices is a combination of the two. Plus there is the issue of licensing, as both AMD and Intel integrate tech that sometimes is developed by third parties. They may even pay extra for exclusive rights to some tech. Then you have other factors, like brand recognition, marketing, and other factors that could make the retail cost markup that much more pronounced. AMD is trying to stick it to Intel but undercutting them, but Intel has constantly had high prices because they have dominated the market for so long that they could set favorable prices.