U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Processed Foods and Feeds: Dry Macaroni, Spaghetti, and Egg Noodle Products, Made from Purchased Flour [WPU02140203], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPU02140203, September 25, 2023.