public class PlantType3 extends TreatmentPlant { private double capacity; public PlantType3(Town t, double x) { super(t, x); capacity= 4.0E9; } public double getCost() { final double c5 = 4.0E-6; final double c6 = 1.0E-19; double p = town.getP(); double unitCost= c5 + c6 * Math.pow(p, 1.5); double totalCost= unitCost * town.getP()*x; return totalCost; } public double getMaxRemoved() { return 0.95; } public double getArea() { return 1.5; } public double getCapacity() { return capacity; } }