Based on the given benefits and disbenefits as well as the initial and M&O costs, the B/C ratio is close to b. 0.66.
First find the present values of the benefits, disbenefits, and M&O costs.
Benefit present value:
= 50,000 / 10%
= $500,000
Disbenefit present value:
= 27,000 / 10%
= $270,000
M&O costs present value:
= 10,000 / 10%
= $100,000
B/C ratio is:
= (500,000 - 270,000) / (250,000 initial cost + 100,000)
= 0.657
= 0.66
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