import java.text.NumberFormat;

public class program2
{
   public static void main(String[] args)
   {
    Customer A = new Customer(10202,"home",67400); 
    Customer B = new Customer(20367,"commercial",3500000); 
    Customer C = new Customer(30581,"commercial",9400000); 
    Customer D = new Customer(40387,"industrial",2300000); 
    Customer E = new Customer(50169,"industrial",8500000); 
    Customer F = new Customer(60123,"industrial",15900000); 

/*
    A.Calculate_Amount();
    B.Calculate_Amount();
    C.Calculate_Amount();
    D.Calculate_Amount();
    E.Calculate_Amount();
    F.Calculate_Amount();
*/

    //I call Calculate_Amount from Display
    A.Display();
    B.Display();
    C.Display();
    D.Display();
    E.Display();
    F.Display();
     
   } // end main 
} // end class WaterBill

class Customer
{
	public Customer()
	{
		idNum 		= 0;
		custType 	= "";
		gallons		= 0;
	}

	public Customer(int id,String cust,int gal)
	{
		idNum 		= id;
		custType	= cust;
		gallons		= gal;
	}
	
	public Customer(Customer obj)
	{
		idNum 		= obj.idNum;
		custType	= obj.custType;
		gallons		= obj.gallons;
	}

	public int getIdNum()
	{
		return idNum;
	}

	public String getCustType()
	{
		return custType;
	}

	public int getGallons()
	{
		return gallons;
	}

	public double Calculate_Amount()
	{
		double amount = 0;
		int diff      = 0;
		final int FOURMIL = 4000000;
		final int TENMIL  = 10000000;

		if(custType.equalsIgnoreCase("home"))
		{
			amount = (0.0005 * gallons) + 5;
			
		}
		else if(custType.equalsIgnoreCase("commercial"))
		{
			if(gallons > FOURMIL)
			{
				diff = gallons - FOURMIL;
				amount = (0.00025 * diff) + 1000;
			}
			else
			{
				amount = 1000;
			}
		}
		else if(custType.equalsIgnoreCase("industrial"))
		{
			if(gallons <= FOURMIL)
			{
				amount = 1000;
			}
			else if((gallons > FOURMIL)&&(gallons <= TENMIL))
			{
				amount = 2000;
			}
			else if(gallons > TENMIL)
			{
				diff = gallons - TENMIL;
				amount = (0.00040 * diff) + 3000;
			}
			else
			{}

		}
		else
		{}
		return amount;
	}

	public void Display()
	{
		NumberFormat formatter = NumberFormat.getCurrencyInstance();
                formatter.setMaximumFractionDigits(2);
                formatter.setMinimumFractionDigits(2);

		NumberFormat numformat = NumberFormat.getNumberInstance();
                numformat.setMaximumFractionDigits(0);
                numformat.setMinimumFractionDigits(0);
	
		System.out.println("=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=");
		System.out.println("Customer ID  : " + getIdNum());		
		System.out.println("Customer Type: " + getCustType());		
		System.out.println("Gallons Used : " + numformat.format(getGallons()));		
		System.out.println("Total Cost   : " + formatter.format(Calculate_Amount()));
		System.out.println("=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=");
		System.out.println();
	}
	private int idNum;
	private String custType;
	private int gallons;
}