The net present worth for a project with an initial construction cost of $$262,000,$ a maintenance cost of $$9,000$ per year, a salvage value of $$29,000$ at the end of the service life, at an annual interest rate of $3\%$ and a $50-$year life, is approximately:

a$.$ $$135,213$

b$.$ $$242,000$

c$.$ $$486,748$

d$.$ $$499,976$

e$.$ None of the above