Ray, Dot, Millie, Pauline
Everyone seems quite serious (or tired) on this shopping trip!
This is a ("DuPont Photo Products") post card that I'm guessing was sent as Christmas mail.
I tried to enlarge the photo even more to see if I could identify anything on the packages, but all I could see is that Mom is carrying a wrapped (plain brown?) package tied with string across both the length and width.
Click the picture for the extra large view >