Margaret does landscaping design for businesses. Because of her experience, she always has a general idea of how much something will cost and will share that number with potential clients, but she has an assistant price everything out just to be sure. She has just received her assistant's price quote for an extremely important project, and it is much higher than the amount she told the client. However, she knows that if she introduces the increased price gradually over the course of the project by saying things like "The rental fee on the backhoe was higher than expected" and "That load of rock cost an additional $500 because...," the client will pay for it. When the client asks if her original estimate was accurate, Margaret says yes. This is an example of