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

Context: So I did it . I survived my 30 hours of overtime with t - mobile . There were the good people and the bad people ..... mostly the bad people . One customer that particularly stuck out in my mind was an older gentleman I spoke to . He was a pure baw .

Answer:

They were short staffed .



What may be the reason they had to work so much overtime ?