(ignore income taxes in this problem) The management of byrge corporation is investigating buying a small used aircraft to use in marking airborne inspections of its above-ground pipelines. The aircraft would have a useful life of 8 years. The company uses a discount rare of 10% in its capital budgeting. The net present value of the investment, excluding the intangible benefits, is -$448,460. To the nearest whole dollar how large would the annual intangoble benefit have to be to make the investment in the aircraft financially attractive?