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 his services. Terry Thomas needed a haircut the local stylist charged him $12 for her services. Aaron Mathison mowed his neighbor s lawn; in exchange, the neighbor roto-tilled Mathison s garden. The attorney fees paid by O Rourke, the $12 charged by the hair stylist, and the exchange of lawn mowing for garden tilling are all examples of
a. price.
b. premiums.
c. barter.
d. outlays.
e. the profit motive.