Have you ever turned down job offers?
a. Yes. If I don't like a job, I won't take it. I have turned down many job offers. As a matter of fact, yesterday, I turned down one for three thousand dollars a month.
b. Yes. If I don't like a job, I won't take it. I have turned down many job offers. As a matter of fact, yesterday, I turned one down for three thousand dollars a month.
I think (b) is saying that I got paid three thousand dollars a month in order to turn down the job! But I think it is possible that people say (b) instead of (a) if they are a bit careless.
Many thanks.