You are deciding whether or not to upgrade some of your firm's equipment. The current gear produces $$631\mathrm{.}88$ in profit per year per unit, and the new gear is expected to produce $$897\mathrm{.}16$ in profit per year per unit. The upgrade would cost $$4480$ per unit. If the discount rate is $13\mathrm{.}0\%$ and the equipment is expected to operate indefinitely, what is the net present value of upgrading one unit of equipment? Round to the nearest penny.