Sharie runs a hair salon and is thinking of buying a new sound system for her employees and customers to enjoy. The new audio system will cost $5,000. Sharie will purchase it with cash that would otherwise sit in a savings account where it would earn $100 in interest. If the system does not work out for Sharie, she thinks she can sell it again for $3,000. The economic cost of the system is: Answers:
A) $100
B) $2000
C) $2100
D) $5000
E) $5100

Suppose that a candy maker owns a building and is renting part of the building's space to a doctor. further suppose that because the candy maker is the owner, he has the right to make noise during the day while he makes candy. while the doctor cannot insist on a quiet environment, the doctor could move to a quieter building. however, rent in the next best building is $350/month more than rent in the noisy building. the candy maker can adopt a new technology that eliminates the noise for $275/month. given this situation, can the doctor find a private solution with the candy maker that will make both better off?