Jim grunig created the enlightened self-interest model for ethical behavior in public relations to advocate that for business to do well, it must do good.

That statement is false

The enlightened self interest model is a philosophy that already exist since the era of Epicurus, so it's not created by Jim Grunig who is just born in 1942. The enlightened self-interest model stated that a person or group who fulfil the interest of others would eventually serve their own interest in the end.

answer/// equals both average variable cost and average total cost at their respective minimums;

answer utilities; more money you have to pay out ; )