Each ton of sewage 1 1,000 yuan, and the later operation and maintenance cost is 40,000 yuan per facility per year. The sewage treatment cost in Xishan District of Wuxi City is per ton of sewage 1 10,000 yuan, and the later operation and maintenance cost is 40,000 yuan per facility per year. Sewage refers to the water discharged from life and production that is polluted to a certain extent. Water that loses its original function is called sewage for short.