answer: #Person2# suggests #Person1# buy seven air conditioning units and offers discount. #Person1# is surprised that the installation is not included in 6000 dollars. #Person1# compares #Person2#'s offer to another company's offer and #Person2# agrees to do the installation for free.
documents: #Person1#: I understand we will need seven air conditioning units on the two floors. That's what you think, yes?
  #Person2#: Yes. You could use five or six units. But five or six wouldn't be very efficient. I recommend seven.
  #Person1#: And if we take the Decker units you suggested, what would the price be?
  #Person2#: Let me calculate the price for you. I can give you a 15 % discount if you buy the seven units. Let's see here. Your total would be 5929 dollars.
  #Person1#: Isn't there any way we can get central air conditioning in this building?
  #Person2#: As I said, it is possible, but it would be much more expensive. I think it would be at least 12000 dollars to do a complete system.
  #Person1#: That's too much. We need to use the separate units, I guess.
  #Person2#: It's more practical, and the new units really are very quiet. Your customers won't even notice them.
  #Person1#: So you say we can do it for 6000 dollars.
  #Person2#: Yes, that's for the units. Installation would probably be another 700 to 1000 dollars. But it depends on the time spent, of course.
  #Person1#: You mean installation isn't included? I'm very surprised.
  #Person2#: No, Ma'am. Installation isn't included. The price I quoted was just for the units.
  #Person1#: In Taipei, you know, the company usually installs the things they sell. They don't charge extra.
  #Person2#: I know that, Ma'am. But they would just raise the price of the units to cover their costs. Here in L. A. , installation is charged separately.
  #Person1#: Yes, I suppose I should get used to it. But I'm not really willing to spend more than 6000 dollars for this. We haven't even opened yet.
  #Person2#: I understand, Ma'am.
  #Person1#: And the other company that gave me a quote on this said they could do it for 4000 dollars.
  #Person2#: It's a question of quality, Ma'am. At that price, you would not get good equipment. I've been in this business for almost twenty years. I know what happens. If you don't get quality air conditioning now, you will just have to replace the system after two years.
  #Person1#: I will tell you what I can agree to. If you can quote me a price of 6000 dollars, installation included, I can accept.
  #Person2#: Well.
  #Person1#: You do seem like a better company than the other one. So I am willing to pay more than 4000 for you. But I won't pay more than 6000.
  #Person2#: Well, we don't usually do it, but. . . I believe we can accommodate you on this. We will do the installation for free. Because we appreciate your business.
  #Person1#: Good. I hope we can arrange the contract as soon as possible.