What does the woman mean?

M: I was shocked when I heard you had finished your research project a whole month earlier.
W: How I managed to do it? It’s still a mystery to me.

M: What do you think of my new suit?
W: Not bad. It reminds me of the one I saw at the new department store last week. Did you get it there?
M: No, I got it in that big shopping center. It cost me only $ 150.
W: Well, I don’t think it’s a good bargain.