public class PlantType2 extends TreatmentPlant { private double capacity; public PlantType2(Town t, double x) { super(t, x); capacity= 6.0E9; } public double getCost() { final double c3 = 4.0E-6; final double c4 = 1.0E-24; final double c7 = 5.0E-7; double p = town.getP(); double unitCost= c3 + c4 * p * p + c7 * getArea(); double totalCost= unitCost * town.getP()*x; return totalCost; } public double getMaxRemoved() { return 0.90; } public double getArea() { final double c8 = 0.5; final double c9 = 5.0E-10; return c8 + c9 * getCapacity(); } public double getCapacity() { return capacity; } }