Question: Two flight guidance systems are being evaluated for a backup control tower at a local airport. One system utilizes conventional radar and the other uses
Two flight guidance systems are being evaluated for a backup control tower at a local airport. One system utilizes conventional radar and the other uses a global positioning system (GPS) . Given a MARR of 12% per year and the cash flow as summarized in the table below, use the IRR method to determine which of the two guidance systems is more economical. Note: These are "cost only" alternatives.
| Radar | GPS | |
| Captial investment | $300,000 | $450,000 |
| Annual exprenses | $60,000 | $30,000 |
| Useful life | 6 years | 6 years |
| Market value at end of useful life | $40,000 | $80,000 |
The incremental IRR is ___% (Write as whole number to the nearest decimal place, e.g., if 12.4% type 12.4)
Which alternative should be selected? Choose the correct answer below.
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