A Chinese official is considering construction of a gondola lift system that transports visitors from the tops of the mountain peaks to the valley at one of the National Forrest Parks in China. The lift system is expected to last for 20 years. Annual maintenance cost of $260,000 and inspection and repair cost of $45,000 every 5 years are expected. Annual benefits are estimated to be $420,000. In an interest of 18% per year and a B/C ration of at least 2.5 are used, what is the maximum investment cost allowed for the lift system?