Kurt is starting a business selling handmade necklaces. He has decided to invest an initial amount of $20 for advertising, and materials cost $7 for each necklace he makes. Kurt can sell his creations for $9 per necklace. Once he makes and sells a certain number of necklaces, he will break even, with identical expenses and sales. How many necklaces would that take? What would the total expenses and sales be then?

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