Costner Inc. would like to introduce its new haircutting machine, the "terminator." The machine will cost $$15,000$ today. $($As a result of purchasing the machine, Costner expects to give $5,000$ more haircuts total for $$8\mathrm{.}50$ each.$)$ In the first year, Costner will give $2,400$ more haircuts, and in the second year Costner will give $2,600$ more haircuts. What is the net present value $($NPV$)$ associated with purchasing the terminator if Costner's cost of capital is $7\%?$