package trail.lifecycle;

import java.util.ArrayList;

public interface Calculator {

  public double calculate (int start, int end, double growthrate, double saving);

  public void stopSession ();

  public ArrayList <Integer> getStarts ();
  public ArrayList <Integer> getEnds ();
  public ArrayList <Double> getGrowthrates ();
  public ArrayList <Double> getSavings ();
  public ArrayList <Double> getResults ();

}
