is this the amount where mr is negative

Following are the demand, total revenue, marginal revenue, total cost and marginal cost schedules (All in $) for a monopolist publisher of a textbook in Microeconomics. Number of Price Total Total Cost Marginal Marginal books per Revenue Revenue Cost hour 0 8 12 7 15 2 6 17 5 20 4 4 24 5 3 29 If the monopolist publisher shuts down and prints no books, how much money does he lose ($) ?