import java.util.Scanner;
class Record_5 
{
	double quantity;
	int matno;
	public static void main(String[] args) 
	{
		Record_5 o1=new Record_5();
		Scanner scanner = new Scanner(System.in);
		System.out.println("The materials are listed below. Please write the material number as described below:-");
		System.out.println("1-Cotton");
		System.out.println("2-Rayon");
		System.out.println("3-Silk");
		System.out.println("4-Cotton Silk");
		System.out.println("5-Hand spun cotton");
		System.out.println("Please enter the material number:");
		boolean i=scanner.hasNextInt();
		o1.matno=scanner.nextInt ();
		if (i==true)
		{
			if (o1.matno==1 || o1.matno==2 || o1.matno==3|| o1.matno==4 || o1.matno==5)
			{
				System.out.println("Please enter the qty.(meters) :");
				boolean d=scanner.hasNextDouble();
				o1.quantity = scanner.nextDouble ();
				if (d==true)
				{
					if (o1.matno==1)
					{	
						double cost = o1.quantity*250;
						System.out.println("Cost :Rs." + cost);
					}	
					else if (o1.matno==2)
					{
						double cost = o1.quantity*150;
						System.out.println("Cost:Rs." + cost);
					}
					else if (o1.matno==3) 
					{
						double cost = o1.quantity*600;
						System.out.println("Cost:Rs." + cost);
					}
					else if (o1.matno==4)
					{
						double cost = o1.quantity*500;
                                                System.out.println("Cost :" + cost);

					}
					else 
					{
						double cost = o1.quantity*550;
						System.out.println("Cost:Rs." + cost);
					}		
				}
				else)
				{
					System.out.println("You have entered a non double value");
				}
			}
			else
			{
			System.out.println("You have entered an invalid material number :(");
			}
		}
		else
		{
			System.out.println("Please enter an int value");
		}
		
	}
}