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20 pts Question 5 You are a member of an engineering project team that is designing a new processing facility. For final analysis and comparison, you have selected two fully lined slurry pump units, of equal capacity, from different manufacturers. Both units will provide the same level of service, but have different operating characteristics and costs. If your MARR = 8% per year, which model slurry pump should you select? Pump Model SP 240 HEP 9 Cost new $33,200 $47,600 Operating cost/year $2,165 $1,720 Maintenance cost/year $1,100 in year $500 in year 4, 1, increasing by increasing by $500/year $100/year Estimated life 5 years 9 years Salvage value at end of life 0 $5,000