A specialty concrete mixer used in construction was purchased for $3000,000 7 years ago. Its annual O&M cost are $105,000. 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. At the end of the 8-year plaaning horixon, it will have a salvage value of $45,000. Its annual O&M cost will only be $40,000 due to newer technology. Analyze this using an EUAC measure and a MARR of 15% to see if the concrete mixer should be replaced if the old mixer is sold for its market value of $65,000.

(a). use the cash flow approach (insider's viewpoint approach).

(b). use the opportunity cost approach (outsider's viewpoint approach).