Among 202 people on a beach, some are wearing sunglasses and some are wearing caps. some people are wearing both sunglasses and caps. The number who wear sunglasses is between 75% and 80% and the number who wear caps is between 55% and 60%. Let m be the smallest possible number of people who wear both sunglasses and caps, and let M be the largest possible number of people who wear both sunglasses and caps. Find M-m.
