500
Baker, Cooper, Jones and Smith have the occupations teacher, welder, mechanic, programmer.
Baker & Cooper are neighbours and take turns driving each other to work. Cooper earns more than Jones. Baker beats Smith at darts. The teacher always walks to work. The programmer does not live near the welder. The mechanic and programmer have only met once. The programmer earns more money then the welder or the mechanic.
Smith - programmer
Cooper - mechanic
Jones - teacher
Baker - welder