A nominal 36-inch pipeline can be installed for $216,600. The annual cost of the 36-inch pipeline including pump operating costs and maintenance is estimated to be $48,600. A nominal 30-inch pipeline can be installed to provide the same flow rate for $161,300. However, the annual operating and maintenance costs are $68,500. The pipeline is expected to last for 20 years with a salvage value equal to 10% of the initial cost. The MARR is 20%. Based on an economic analysis, which diameter pipeline should be installed?