A bowling alley charges a flat fee $6.50 for shoe and ball rental plus $3.75 per game and 6.325% sales tax. if each person in a group of 7 people has $20 to spend on a bowling outing and at least some members of the group must rent shoes and a ball, which inequality best describes this situation, given that the number of shoe and ball rentals is represented by r and the number of games is represented by g?

Please explain in detail if you can. I'm confused​