The population of S city round to 10,000 is 140,000; The population of M city round to 10,000 is 80,000. What is the sum of the population of S city and M city if the sum is rounded to 10,000?
(1)Two figures are rounded within 2% of the original number;
(2)The population of S city is upward when it is rounded, while the population of M city is downward when it is rounded