The following estimates (in $1000 units) have been developed for a security system upgrade at Chicago’s O’Hare Airport. (a) Calculate the conventional B/C ratio at a discount rate of 10% per year. Is the project justified? (b) Determine the minimum first cost that is possible to render the project just economically unjustified. Item Cash Flow First cost, $ 13,000 AW of benefits, $ per year 3,800 FW of disbenefits, year 20, $ 6,750 M&O costs, $ per year 400 Life, years 20

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The following estimates (in $1000 units) have been
developed for a security system upgrade at
Chicago’s O’Hare Airport. (a) Calculate the conventional
B/C ratio at a discount rate of 10% per
year. Is the project justified? (b) Determine the
minimum first cost that is possible to render the
project just economically unjustified.
Item Cash Flow
First cost, $ 13,000
AW of benefits, $ per year 3,800
FW of disbenefits, year 20, $ 6,750
M&O costs, $ per year 400
Life, years 20

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