United Natural Foods, Inc. (NYSE:UNFI) will release earnings results for the first quarter before the opening bell on Tuesday, Dec. 2.Analysts expect the Providence, Rhode Island-based company to report quarterly earnings at 40 cents per share, up from 16 cents per share in the year-ago period. The consensus estimate for United Natural Foods' quarterly revenue is $7.91 billion, compared to$7.87 billion a year earlier, according to data from Benzinga Pro.On Sept. 30, United Natural Foods reported better-tha ...