The initial cost of a packed-bed degassing reactor for removing trihalomethanes from potable water is $84,000. The annual operating cost for power, site maintenance, etc. is $13,000. If the salvage value of the pumps, blowers, and control systems is expected to be $9000 at the end of 10 years, the AW of the packed-bed reactor, at an interest rate of 8% per year, is closest to: (a) $−26,140 (b) $−25,518 (c) $−24,900 (d) $−13,140

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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The initial cost of a packed-bed degassing reactor
for removing trihalomethanes from potable water
is $84,000. The annual operating cost for power,
site maintenance, etc. is $13,000. If the salvage
value of the pumps, blowers, and control systems
is expected to be $9000 at the end of 10 years, the
AW of the packed-bed reactor, at an interest rate of
8% per year, is closest to:
(a) $−26,140
(b) $−25,518
(c) $−24,900
(d) $−13,140

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