Your company is evaluating whether to purchase an equipment or not. The initial cost is $45,686. According to your estimate, the equipment can have annual savings of $6,230 with 0.5 possibility or have annual savings of $5,967. The useful life of the equipment is 10 years, and with equal chance to have a salvage value of $18,462 or $16,862. Given MARR=6%, what is the expected NPV of the equipment? For a residential building project, the developer has estimated the capital investment, net rental revenue, and resale value after 6 years for the following three scenarios. Given the developer's MARR is 8%, what is the estimated B/C ratio of this project