Just like prescription medications which cost six cents a pill to make and sell for $700 for 30...I wouldn't draw any parallels with power cords, though. According to this article in Forbes research and development expenditures by a dozen major drug producers, from 1997 to 2011, divided by the number of their drugs that were ultimately approved and brought to market ranged from $3.7 to $11.8 billion dollars per approved drug.
Regards,
-- Al