Susan O'Rourke Hired an Attorney to Represent Her in a Court

Susan O'Rourke hired an attorney to represent her in a court case involving an auto accident.The attorney charged O'Rourke a $2,000 retainer fee for her services.Terry Thomas needed a haircut; the local stylist charged him $12 for his services.Aaron Mathison mowed his neighbor's lawn; in exchange,the neighbor repaired Mathison's gutters.The attorney fees paid by O'Rourke,the $12 charged by the hair stylist,and the exchange of lawn mowing for gutter repair are all examples of

A) premiums.
B) barter.
C) the profit motive.
D) price.
E) outlays.