When will Mr. Scott come? What is the lowest price the man can buy the machine for?

F: When will Mr. Scott from GM come to our company?
M: Well, he planned to come on July 23, but he called yesterday telling be had to go to Spain on business with his boss. Now he’s planning to come next Friday, that’s July 31st.
F: I see.

F: ... and this machine is fifteen thousand dollars.
M: What does that include?
F: Free servicing for a year. Free training. Plus you can exchange it for a newer model after two years, for just ten thousand dollars.
M: I was hoping to pay less. Thirteen thousand?
F: Sorry. That’s our best price.