This is something that really happened when I was at a supermarket. I couldn’t understand the reason for this person to be so specific about how much they wanted. I usually get a half pound because it’s an easy number, but why ask for 0.4 lbs of something? Is your sandwich geared towards only using a number of slices that can be evenly divided from that amount of cold cuts? Plus the size of the slices usually varies unless you specify so I couldn’t understand this needlessly specific request.