39. Ginger was willing to pay $160 for a textbook to use it for the semester, but she got it for $120 at the bookstore. Now she has completed the course and the book is worth $50 to her. She can keep it or sell it back to the bookstore. The bookstore will pay her 30% of the original price. If Ginger makes her best choice, her overall (gain/loss)____ from trade will be $_____(enter a whole number)

42. A cable TV company faces the following demand schedule for its service:

The company's marginal cost is constant at $58.

What price should the company charge to maximize its profit

Price ($/month)	Subscribers
68	4,000
66	6,000
64	8,000
62	10,000
60	12,000
58	14000