The demand curve is the same as the marginal benefit curve and the supply curve is the same as the marginal cost curve. You produce at the equilibrium in this type of market since it produces the best result for both the company and society. This is introductory microeconomics.
It's probably a bad thing that I know so little about economics that I can't say for sure if you are disagreeing or agreeing with me. I'm leaning towards disagreeing, but I'll have to remedy that knowledge gap sometime this weekend.
