It costs $85 for a ride in a hot air balloon. however, the manager says you have another choice. he has placed in a box, 5 red cards, 7 green cards, and 3 blue cards. if you pull out a red card, you get a discount of 5%, a green card means you pay an additional 1/17, and a blue card gets you a discount of $15. should you pick a card or pay the $85?