Break-Even Analysis

The GoodTaste Club collected recipes from members and published a cookbook entitled Eat 'Em Up. The book will sell for $15 per copy. The chairwoman of the cookbook development committee estimated that the club needed to sell 10,800 books to break even on its $54,000 investment. What is the variable cost per unit assumed in the GoodTaste Club's analysis? (Round your answer to the nearest whole number.) $ per unit