The cost of publishing a small book is $10000 to set up the press run plus $8 for each book printed. The publisher sold 7000 copies last year at $13 each but sales dropped to 5000 copies this year when the price was raised to $15 per copy. Assume that up to 10000 copies can be printed in a single press run. How many copies should be printed and what should be the selling price of each copy to maximize the year's profit on this book?

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