Question

My IDE : NETBEAN JAVA

THANK YOU SO MUCH ( THE QUESTION IS ON SPECIFICATION)

Sample Run

Department Store Sales Tax and Grand Total Application

Data Entries: Enter 0 to end your input
Cost of item: 35.99
Cost of item: 27.50
Cost of item: 19.59
Cost of item: 0
All items total: $83.08

Sales tax rate (%): 6
Promotion code: 123

Discount amount: $1.00
Subtotal: $82.08
Sales tax amount: $4.92
Grand total: $87.00

Continue? y/Y/n/N: y

Data Entries: Enter 0 to end your input
Cost of item: 10.99
Cost of item: 35.50
Cost of item: 11.52
Cost of item: 21.58
Cost of item: 0
All items total: $79.59

Sales tax rate (%): 12
Tax rate should be from 6 to 10
Sales tax rate (%): 9
Promotion code: 456

Discount amount: $2.00
Subtotal: $77.59
Sales tax amount: $6.98
Grand total: $84.57

Continue? y/Y/n/N: y

Data Entries: Enter 0 to end your input
Cost of item: 95.21
Cost of item: 0
All items total: $95.21

Sales tax rate (%): 10
Promotion code: 999
Invalid promotion code. Try again
Promotion code: 789

Discount amount: $3.00
Subtotal: $92.21
Sales tax amount: $9.22
Grand total: $101.43

Continue? y/Y/n/N: Y

Data Entries: Enter 0 to end your input
Cost of item: 152.50
Cost of item: 59.80
Cost of item: 0
All items total: $212.30

Sales tax rate (%): 8

Discount amount: $21.23
Subtotal: $191.07
Sales tax amount: $15.29
Grand total: $206.36

Continue? y/Y/n/N: N

Program is terminated

Specifications

• The sales tax rate is from 6% to 10%.
• The system accepts only the following promotion codes for a discount amount:
  • 123 ($1 discount)
  • 456 ($2 discount)
  • 789 ($3 discount)
  • 0 (no discount)
• If the all items total is $100 or more, the discount amount is 10% of the total. No other discounts are applied.
• The methods should round the results to a maximum of two decimal places. The subtotal, the sales tax amount, and the grand total are calculated as follows:
  • subtotal = all items total - discount amount
  • sales tax amount = subtotal * (sales tax rate / 100)
  • grand total = subtotal + sales tax amount
• Store the code that gets user inputs and displays outputs in the main method.
• Your project should contain one main class that defines the following static methods:
  • main()
  • getDiscount()
  • getItemsTotal()
  • getSalesTax()

Answer 1

/*
* Java program that prompts the user to enter the cost of items until
* user enters 0 to stop reading items. Then display the total items cost
* then prompt for sales tax in a range of 6 to 10. Then prompt for the promo code
* if the total amount is below 100 otherwise calculate a 10% discount on the total.
* Then calculate subtotal, sales tax, and grand total and display on java console.
* Continue the program until the user enters N or n to stop reading user input
* and terminate the program if the user enters n or N from the keyboard.
* */
//Store.java
import java.util.Scanner;
public class Store
{
   private static Scanner kboard=new Scanner(System.in);
   public static void main(String[] args)
   {
       System.out.println("Department Store Sales Tax and Grand Total Application");
       double total;
       String userchoice="y";
       do
       {
           //call method to read cost of items and get total cost of items
           total=getItemsTotal();
           System.out.printf("All items total: $%.2f\n",total);
           System.out.printf("Sales tax rate(%%): ");
           //read sales tax value
           double salestax=Double.parseDouble(kboard.nextLine());
           //validate the sales tax in between 6 and 10
           while(salestax<6 || salestax>10)
           {
               System.out.println("Tax rate should be from 6 to 10");
               System.out.printf("Sales tax rate(%%): ");
               salestax=Double.parseDouble(kboard.nextLine());
           }

           double discount;
           if(total<100)
           {
               System.out.printf("Promotion code: ");
               //Read promocode
               int promocode=Integer.parseInt(kboard.nextLine());
               while(!(promocode==123|| promocode==456|| promocode==789) )
               {
                   System.out.println("Invalid promotion code. Try again");
                   System.out.printf("Promotion code: ");
                   //Read promocode
                   promocode=Integer.parseInt(kboard.nextLine());
               }

               //calculate discount
               discount=getDiscount(promocode);
               System.out.printf("Discount amount: $%.2f\n",discount);  
           }
           else
           {
               discount=total*0.10;
           }
          
           //calculate subtotal
           double subtotal=total-discount;  
           System.out.printf("Subtotal: $%.2f\n",subtotal);
           //calcuate sales tax amount
           double salestaxamount=getSalesTax(subtotal, salestax);
           System.out.printf("Sales tax amount: $%.2f\n",salestaxamount);
           System.out.printf("Grand total: $%.2f\n",(subtotal+salestaxamount));
           //read userchoice
           System.out.print("Continue? y/Y/n/N: ");
           userchoice=kboard.nextLine();

       }while(!userchoice.equals("n") && !userchoice.equals("N"));
       System.out.println("Program is terminated");
   }//end of the method, main

   /*Method to find the sales tax amount*/
   public static double getSalesTax(double subtotal, double salestax)
   {
       double salestaxamount=subtotal * (salestax/ 100);
       return salestaxamount;
   }//end of the method, getSalesTax

   /*Method to find the discount amount on promocode*/
   public static double getDiscount(int promocode)
   {
       int discount=0;
       if(promocode==123)
           discount=1; //discount 1$
       else if(promocode==456)
           discount=2; //discount 2$
       else if(promocode==789)
           discount=3; //discount 3$
       else
           discount=0;
       return discount;
   }//end of the method, getDiscount

   /*Method to find the total cost of items*/
   public static double getItemsTotal()
   {
       double itemcost=0;
       double totalcost=0;
       System.out.println("Data Entries: Enter 0 to end your input");
       System.out.print("Cost of item: ");
       itemcost=Double.parseDouble(kboard.nextLine());
       while(itemcost!=0)
       {
           totalcost=totalcost+itemcost;
           System.out.print("Cost of item: ");
           itemcost=Double.parseDouble(kboard.nextLine());
       }
       return totalcost;
   }//end of the method, getItemsTotal
}

Sample output screenshot: