import java.io.PrintStream;

import franck.cse5910.ShapeCollection;
import franck.cse5910.Shape;

public class PrintArea
{
    public static void main(String[] args)
    {
	PrintStream output = System.out;
	
	double total = 0;
	ShapeCollection shapes = ShapeCollection.getRandom();
	for (Shape shape : shapes)
	{
	    total += shape.getArea();
	}
	output.printf("%.2f%n", total);
    }
}