A robot may not injure a human being or, through inaction, allow a human being to come to harm.
The situation existed when the positronic brain was damaged, and when the robot convinced itself the rule should be broken "for the betterment of the whole race of humanity."
A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
As demand for a certain product increases, consumers are willing to pay more for said item.