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The management of Niagara National Bank is considering an investment in automatic teller machines. The machines

would cost $$169,200$ and have a useful life of seven years. The bank's controller has estimated that the automatic teller

machines will save the bank $$36,000$ after taxes during each year of their life $($including the depreciation tax shield$).$ The

machines will have no salvage value.

Use Appendix A for your reference. $($Use appropriate factor$($s$)$ from the tables provided.$)$

Compute the net present value of the proposed investment assuming an after$-$tax hurdle rate of $($a$)10$ percent, $($b$)12$ percent, and $(c)$

$14$ percent. $($Do not round intermediate calculations. Negative amounts should be indicated by a minus sign.$)$