Suppose the marginal cost of the fourth unit of a public good is $20. If Mark and Judy are the only members of society, and they are willing to pay $10 and $11, respectively, for the fourth unit of the good, then the efficient quantity is:

A) 3 units. B) 4 or more units. C) 0 units. D) More information is needed about the marginal benefits of the first, second, and third units of the public good. E) None of the above answers is correct.

Slimwood corporation made sales of $ 725 million during 2018. of this amount, slimwood collected cash for $ 670 million. the company's cost of goods sold was $ 300 million, and all other expenses for the year totaled $ 400 million. also during 2018, slimwood paid $ 420 million for its inventory and $ 285 million for everything else. beginning cash was $ 110 million. carter's top management is interviewing you for a job and they ask two questions: (a) how much was carter's net income for 2018? (b) how much was carter's cash balance at the end of 2016? you will get the job only if you answer both questions correctly.