A and B are considering living alone or being roommates and splitting the rent for the next twelve months. A one bedroom, one bath apartment is $500 per month while a two bedroom, one bath apartment is $800. The one difficulty they have is that B snores very loudly. A estimates the cost of poor sleep due to B’s snoring at $150 per month. B could obtain a snore-eliminating device for $50 per month. If they share the surplus equally, A’s share of th