A proposed nuclear power plant will cost $2 4 billion to build and then will produce cash flows of $320 million a year for 15 years. After that period (in year 15). it must be decommissioned at a cost of $920 million. What is project NPV if the discount rate is 3%? What if it is 16%? (Negative amounts should be Indicated by a minus sign. Do not round intermediate calculations. Enter your answers In billions rounded to 3 decimal places.)