What socio-economic background did Sophie belong to? What are the indicators of her family’s financial status?

Sophie’s family was a lower-middle-class family. While describing the setting of the house which was small with a messy sink having a pile of dirty dishes and while Jansie thinks of working in the biscuit factory after school indicates their financial status. Also, Geoff’s occupation as a mechanic and Sophie’s dreams, ambition to become famous earn lot of money another situation in the story when her father goes to the pub riding his bicycle indicates their financial background.