Most of the costs you mention are amortized over the lifetime of a product. Not only that, but their true costs are nearly impossible for outsiders to discern.

Most of the costs you mention are amortized over the lifetime of a product. Not only that, but their true costs are nearly impossible for outsiders to discern. Manufacturing costs are a good indicator of what margin is possible in a mass-produced product and so useful to other businesses considering competing in that market.