5. A machine was just purchased for $900,000. When the machine will be sold later at t=n, its salvage value would be around 100,000*(0.8)^". The O&M cost in the first year is $100,000 and is expected to increase by S5,000 per year of use. Given a MARR of 6%, what is the EUAC of this machine if it is used for 5 years? (20pts)