Mark Kelnhofer is the President & CEO of Return On Ingredients, international speaker, hospitality educator, and author. With a managerial accounting background, he covers numerous topics about recipe costing, menu engineering, and just-in-time (JIT) practices. He’s the author of two books including "Return On Ingredients: Controlling Food & Beverage Costs To Improve Efficiency & Profit" and "The Culinary Pocket Resource of Yields, Weights, Densities & Measures".