I uploaded the answer to a file hosting. Here's link:
tinyurl.com/wpazsebu
Answer:
I would say "Twenty dollars a week doesn’t go far. Expenses had been greater than she had calculated. They always are."
Explanation:
In this answer, it explicitly says " Expenses had been greater than she had calculated. They always are." which infers that by saying "they always are", would imply she never makes enough money to be financially fit.
I would say his purpose is to show how she and her community live everyday something near that
