A specialty concrete mixer used in construction was purchased for $300,000 5 years ago. It is MACRS-GDS 7-year property. Its annual O&M costs are $105,000. The remaining useful life is 8-years and at the end of the 8-year planning horizon, the mixer will have a salvage value of $5,000. If the mixer is replaced, a new mixer will require an initial investment of $375,000, and at the end of the 8-year planning horizon, the new mixer will have a salvage value of $45,000. Its annual O&M cost will be $40.000 due to newer technology and increasing by 5% per year thereafter. Use an EUAC measure, a tax rate of 40 percent, and after-tax MARR of 9% to perform an after-tax analysis to sec if the concrete mixer should be replaced if the old mixer is sold for its market value of $65.000. a. Use the opportunity cost approach (outsider's viewpoint approach)