A project to control flooding from rare, but sometimes heavy rainfalls in the arid southwest will have the cash flows shown below Determine which project should be selected on the basis of an incremental BC analysis at-8% per year and a 20-year study period Sanitary Open 3 Channels Sewers 53 million $26 million 400,000 First cost $ M & O cost $/year Homeowner cleanup costs$ per 60,000 year 30,000 0