The Junior League of Yadkinvilie, Calfornio, collected recipes from members and published a cookbook entitfed Food for Everyone. The book wul sell for $24 per copy. The chairwomen of the cookbook deveiopment committee estimated that the club needed to seli 9,100 books to break even on its $81,900 investment. What is the variable cost per unit assumed in the Junior League's analysis? (Round your answer to the nearest whole numbers) per unit