Suppose the marginal utility of good $A$ is $20$ and its price is $$4,$ and the marginal utility of good $B$ is $50$ and its price is $$5.$ The individual to whom this information applies is spending $$20$ on each good. Is he or she maximizing satisfaction? If not, what should the individual do to increase total satisfaction? On the basis of this information, can you pick an optimum combination? Why or why not?