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An existing robot can be kept $2.000 is spent now to upgrade it for future service requirements. Alternatively, the company can purchase a new robot to replace the old robot. The following estimates have been developed for both the defender and the challenger. The company's before-tax MARR is 15% per year Based on this information should the existing robot be replaced right now? Assume the robot will be needed for an indefinite period of time Defender Challenger Current MV $36.000 Purchase price 550.000 Required upgrade S2000 Installation cost 56.000 Annual expenses $1,700 Annual expenses $1.100 Remaining useful life 6 years Useful 10 years MV at end of useful life - $1,400 MV at end of useful life Click the icon to view the interest and annully table for Giscrete compounding when the MARR is 15% per you The AW value of the detender is $.(Round to the nearest dolar) The AW value of the challenger is $(Round to the nearest dollar) The existing robot be replaced right now 57000 should should not