import javax.swing.*;

public class CashierFive {	
	public void ringUpCustomer(String customerName) {
		String item;
		double total = 0.0, milkPrice = 3.50, bottleWaterPrice = 1.0;
		double sugarPrice = 1.25;
		
		do 
		{
			item = JOptionPane.showInputDialog("Enter Item Description");
			if (item.equals("milk")) 
			{
				total = total + milkPrice;
			} 
			else if (item.equals("bottleWater")) 
			{
				total = total + bottleWaterPrice;
			} 
			else if (item.equals("sugar")) 
			{
				total = total + sugarPrice;
			}
			
		} while (!item.equals("end"));
		
		String reply = "Your total is: $" + total + "\nPlease enter payment amount.";
		// Notice using showInputDialog for output and input
		String paymentString = JOptionPane.showInputDialog(reply);
		double payment = Double.parseDouble(paymentString);
		while (payment < total) {
			String wrongAmountReply = "Insufficient payment provided. \n" + reply;
			paymentString = JOptionPane.showInputDialog(wrongAmountReply);
			payment = Double.parseDouble(paymentString);	
		}
		
		reply = customerName + ", thank you for shopping with us.\n";
		reply = reply + "Your change is: $" + (payment - total);
		JOptionPane.showMessageDialog(null, reply);
	}
}