German brothels recently began offering a monthly subscription service for multiple purchasers. If you thought that the brothels' encouragement of prostitution was immoral to begin with, would you consider this pricing plan to be even more immoral? Suppose a particular patron at a German brothel has the following willingness-to-pay schedule for services at the brothel, per session. Session Willingness to Pay 1st $105 2nd $90 3rd $75 4th $60 5th $45 6th $30 Suppose this consumer would not demand any more sessions, even for free. Also assume that the marginal cost to the brothel, per session, is constant at $15. At a price of $82.50 per session, the number of sessions demanded by this consumer would be . At this price and quantity, consumer surplus is