A hot baked potato of mass 100 g at 120°C is left inside a room to attain equilibrium with the air. The air inside the room is at a temperature of 30°C. The specific heat of the air at constant pressure and constant volume is given as 1.005 kJ/kg.K and 0.718 kJ/kg.K. The specific heat of the baked potato is 3.5 kJ/kg.K, the entropy change of the universe is ____ J/K