Lower Class

I usually study at Starbucks, and Ive recently heard about a Mother and Son that I see often when I'm there. They sleep in their car at nights and only have one pair of clothes that I always see them wearing. The Mother works at a high school cafeteria, she would be considered lower class when it comes to social classes. Lower class contains the 20% of our countries population that usually don't have a high level of education.