In which situation does the individual involved make a profit?
A)
Reagan wishes she had not spent $300 on a particular video game console because all of the games she wants to play are on a competing console. Her friend owns the other console, which also costs $300, and offers to trade it for Reagan's because she has already played all of the games she wanted to on it.

B)
Fearing that tickets for the movie he wants to see may sell out, Raul drives to the movie theater and buys two tickets for $10 each for him and his friend for a showing later in the day. Raul's friend pays him $12 for the ticket and for making sure they got tickets to see the movie.

C)
Alexis wants to earn extra spending money so she decides to start a lawn mowing business. She buys a $200 mower and goes door-to-door to advertise offering to keep each lawn mowed throughout the summer for $50. Over the course of the summer, she acquires four customers in her neighborhood.

D)
Luis, who played on his high school's tennis team, offers to give his friend Jeremy, a barber, tennis lessons. Jeremy, in exchange, offers to give Luis a trim for each lesson. Over the course of three months, Luis has given his friend five lessons and received a trim five times.