There's a sentence at the beginning of an article: During the Depression, Lavona Sherarts rolled up her socks in the winter and rolled them down in the summer.
And a related question is "Why did she do that?"
I know that sentence must have implied sth, but I just don't understand why this is because her family was poor?
So how can we get this kind of inference? Can you explain this for me? Thank you so much.