en CB01 OFFICIAL. First in first out (FIFO) is a shelving technique used in supermarkets. Stephan must place the freshest products behind the oldest ones. Products nearing their sell-by date must be destroyed. When going to the bins in the basement, Stephan will have to face those who could still benefit from them, but who are excluded by the system. He will also have to confront who he was before getting a job.