Two alternative excavators are being considered by an earthwork contractor. Excavator Brand A has a capital cost of 80,000 and an annual maintenance cost of 5,000. Excavator Brand B has a capital cost of 100,000 and an annual maintenance cost of 4,000. The revenues from the Excavator Brand A and Excavator Brand B are estimated at 20,000 per annum and 22,000 per annum. The life of both the excavators is 10 years. There is no salvage value for Excavator Brand A while the salvage value for Excavator Brand B is estimated at 10,000. n Using an interest rate of 10% (Table Q.3c) determine which excavator is preferred based on the Net Present Value. Discount Factor 10% 0.9091 2 0.8264 3 0.7513 4 0.6830 5 0.6209 6 0.5645 7 0.5132 8 0.4665 9 0.4241 10 0.3855 Table Q.3c