Suppose Campus Books, a profit-maximizing firm, is the only supplier of the textbook for a given class. The marginal cost of supplying each book is constant and equal to $10, and Campus Books has no fixed costs. The table shows the reservation prices of the eight students enrolled in the class. CustomerReservation Price($/Book)Q60R54S48T42U36V30W24X18If Campus Books is permitted to charge 2 prices, and the bookstore knows customers with a reservation price above $30 never bother with coupons, whereas those with a reservation price of $30 or less always use them, then the bookstore will set the list price of the book to be ________ and the discounted price of the book to be ________.
A. $30; $24
B. $30; $18.
C. $36; $30
D. $36; $24
Answer: D
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