Cameron works in a department store selling clothing. He makes a guaranteed salary of $200 per week, but is paid a commision on top of his
base salary equal to 5% of his total sales for the week. How much would
Cameron make in a week in which he made $1400 in sales? How much would
Cameron make in a week if he made a dollars in sales?

Total earning when selling $1400:

total earnings when selling $x

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?