National Cruise Line, Inc. is considering the acquisition of a new ship that will cost $600,000,000.$ In this regard, the president of the company asked the CFO to analyze cash flows associated with operating the ship under two alternative itineraries: Itinerary $1,$ Caribbean Winter$/$Alaska Summer and Itinerary $2,$ Caribbean Winter$/$Eastern Canada Summer. The CFO estimated the following cash flows, which are expected to apply to each of the next $15$ years: