import com.imsl.finance.*;
import java.text.NumberFormat;

public class irrEx1 {
    public static void main(String args[]) {
        double[] pmt = {-4500., -800., 800., 800., 600., 600.,
        800., 800., 700., 3000.};
        
        double irr = Finance.irr(pmt);
        NumberFormat nf = NumberFormat.getPercentInstance();
        nf.setMaximumFractionDigits(2);
        System.out.println("After 9 years, the internal rate of return on " +
        "the cows is " + nf.format(irr));
    }
}