[originaltext]W: I’d like to exchange this green tablecloth that I bought last

W: I’d like to exchange this green tablecloth that I bought last week for the red one.
M: Let’s see now. The red costs only $10.95, and the green one was 15.
Approximately how much money does the clerk owe the woman?

W: Why are you giving me a speeding ticket? I was going at 40 miles per hour.
M: Can’t you see the notice nearby ? It reads "10 mph limits".
What is the possible relationship between the two speakers?