$5-$S$2$ A new recycling sorting and processing line is proposed to serve a medium size city. The installed cost of the new line is $$2,400,000.$ The residual value after ten years is estimated at $$360,000.$ The unit would produce recycled material ready for resale at a rate of $$\frac{0\mathrm{.}15}{?}$ pound, and would run for ten years. How much recyclable material must be generated every year to justify the project $($i$.$e$.,$ for the present value of the project to be positive$).$ Use an interest rate of $9\%.$