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.