Based on the context and the answer, generate a question. 

Context: I worked in a jewelry store . Back in grad school and before kids while full - time substitute teaching , to be exact . Let me start by saying I have always loathed working in retail of any kind , but it happened to be one of the things I was pretty good at for some reason . I sold lots of expensive stuff .

Answer:

Because grad school is very expensive .



Why did the narrator work in the jewelry store ?