The cash flows for two small raw water treatment systems are shown below. Determine using spreadsheets which should be selected on the basis of an annual worth analysis at 10% per year interest

6.18 The cash flows for two small raw water treatment systems are shown. Determine which should be selected on the basis of an annual worth analysis at 10% per year interest. MF UF First cost, $ Annual cost, $ per year Salvage value, $ Life, years 33,000 -51,000 -3,500 11,000 -8,000 4,000