Here is an American made work shirt for $70 https://www.allamericanclothing.com/collections/mens-long-sl... it's in khaki not blue and the cloth is twill vs chambray but thats because twill is a better fabric for the use case.

And as a reminder blue collar work was _an improvement_ over the default which was agricultural work. Most workers in the US could not afford to buy clothing from a catalog in the 1930s.

The dress comparison was as opposed to her peer group who wore clothes made out of seed bags.