At a recent cross country meet, spectators had to pay to get in. It cost $7 for adults and $3 for students. The Booster Club selling tickets forgot to keep track of how many adult and student

tickets they sold. However, they did know they sold 155 total tickets and made $645.

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.