Step 6

import java.text.NumberFormat;
import java.util.Scanner;



public class InvoiceApp

{
    public static void getDiscountPercent(){
            Scanner sc = new Scanner(System.in);

            String choice = "y";



            while (!choice.equalsIgnoreCase("n"))


            {

                // get the input from the user

                System.out.print("Enter customer type (r/c/t): ");

                String customerType = sc.next();


                System.out.print("Enter subtotal:   ");

                double subtotal = sc.nextDouble();



                // get the discount percent

                double discountPercent = 0;

                if (customerType.equalsIgnoreCase("R"))

                {

                    if (subtotal < 100)

                        discountPercent = 0;

                    else if (subtotal >= 100 && subtotal < 250)

                        discountPercent = .1;

                    else if (subtotal >= 250 && subtotal <500)

                        discountPercent = .25;

                    else if (subtotal >= 500)

                        discountPercent = .3;

                }

                else if (customerType.equalsIgnoreCase("C"))

                {

                        discountPercent = .2;

                }

                else if (customerType.equalsIgnoreCase("T"))

                {
                        if (subtotal <500){
                            discountPercent = .4;
                        }
                        else{
                            discountPercent = .5;
                        }


                }

                else{

                    System.out.println("That is not a valid customer type.");

                }



                // calculate the discount amount and total

                double discountAmount = subtotal * discountPercent;

                double total = subtotal - discountAmount;



                // format and display the results

                NumberFormat currency = NumberFormat.getCurrencyInstance();

                NumberFormat percent = NumberFormat.getPercentInstance();


                System.out.println(

                    "Discount percent: " + percent.format(discountPercent) + "\n" +

                    "Discount amount:  " + currency.format(discountAmount) + "\n" +

                    "Total:            " + currency.format(total) + "\n");



                // see if the user wants to continue

                System.out.print("Continue? (y/n): ");

                choice = sc.next();

                System.out.println();

            }
    }
    public static void main(String[] args)

    {

       getDiscountPercent();

    }

}