import java.util.*;

// compute the cost of shipping a package based on its weight

public class Prog3_18
{
	public static void main(String[] args)
	{
		Scanner in = new Scanner(System.in);
		System.out.print("Enter the weight of the package in pounds:  ");
		double weight = in.nextDouble();
		double cost = -1.0;				// default cost in case weight exceeds limit
		if(weight<=0) System.out.println("Error, package cannot 0 or negative pounds");
		else {	
			if(weight <= 1) cost = weight * 3.5;
			else if(weight <= 3) cost = weight * 5.5;
			else if(weight <= 10) cost = weight * 8.5;
			else if(weight <= 20) cost = weight * 10.5;
			if(cost >= 0)
				System.out.printf("%s $%6.2f", "The cost to ship your package of " + weight + " pounds is ", cost);
			else System.out.println("Cannot ship a package that weighs " + weight + " pounds, try Fedex");
		}
	}
}