Passage: Atari, Inc. had been purchased by Warner Communications in 1976 for $28 million, and had seen its net worth grow to $2 billion by 1982. By this time, the company accounted for 80% of the video gaming market; and was responsible for over half of its parent company's revenues, earning some 65–70% of their operating profits. By the last quarter of 1982, its growth in the following year was expected to be in the region of 50%. However, on December 7, 1982, the company reported that its earnings had only increased by 10–15%, rather than the predicted figure. The next day saw Warner Communications' share prices fall by a third, and the quarter ended with Warner's profits falling by 56%. In addition, Atari's CEO, Ray Kassar, was later investigated for possible insider trading charges as a result of selling some five thousand shares in Warner less than half an hour before reporting Atari's lower-than-expected earnings. Kassar was later cleared of any wrongdoing, although he was forced to resign his position the following July. Atari, Inc. would go on to lose $536 million in 1983, and was sold off by Warner Communications the following year.

Question: In what month did Kassar resign?
July