Now listen to part of a lecture in a business class.
OK, so, for example, I have a friend who owns a company that does construction. His company's often hired to make improvements to someone's house or yard. So, recently, this woman hired him to build a fence around her yard. She said she wanted a wooden fence running all the way around her backyard. She and my friend quickly settled on a price for the job. They basically just made a verbal agreement about the work that will be done without putting any of the agreement in writing.
And so my friend got to work building the fence. So when my friend was almost finished building the fence around the woman's yard, the woman told my friend that she wanted the fence painted white. My friend was surprised by this, because he did not think that he had been hired to also paint the fence. He told the woman this, that he had just been hired to build the fence, not paint it. But the woman said she thought when she hired him to build the fence that this also meant the fence would be painted. They ended up arguing and aeventually my friend finally agreed to paint the fence without charging extra just to be nice, but he wasn't happy about it.