Street lighting fixtures and their sodium vapor bulbs for a​ two-block area of a large city need to be installed at a first cost​ (investment cost) of ​$140,000.Annual maintenance expenses are expected to be ​$6,500 for the first 7 years and $9,000 each year thereafter up to 25 years. With an interest rate of 6​%per​ year, what is the present worth cost of this​ project?

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