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Write a CashRegister class that can be used with the RetailItem class that you wrote in Part 1. The CashRegister class should simulate the sale of a retail item. It should have a constructor that accepts a RetailItem object as an argument. The constructor should also accept an integer that represents the quantity of items being purchased. In addition, the class should have the following methods:• The getSubtotal method should return the subtotal of the sale, which is the quantity multiplied by the price. This method must get the price from the RetailItem object that was passed as an argument to the constructor.• The getTax method should return the amount of sales tax on the purchase. The sales tax rate is 6 percent of a retail sale.• The getTotal method should return the total of the sale, which is the subtotal plus the sales tax.Demonstrate the class in a program that asks the user for the quantity of items being purchased and then displays the sale's subtotal, amount of sales tax and total.And here is my RetailItem Class I wrote....import java.io.*;import java.util.Scanner; //Needed for Scanner Classpublic class RetailItem {private String description; // Name of itemprivate int units; // Amount of unitsprivate double price; // Price of each unitpublic RetailItem(){}// Counstructor with arguementspublic RetailItem(String des, int u, double p){description = des;units = u;price = p;}/***This setDescription Method sets the item description*@param des The String stored in the description field.*/public void setDescription (String des){description=des;}/***This setPrice Method sets the price of the item.*@param p The value stored in the price field.*/public void setPrice (double p){price=p;}/***This setUnits Method is the number of units of a*specific item.*@param u The value stored in the units field.*/void setUnits(int u){units = u;}/***The getUnits method returns the number of units.*@return The Value in the Units field.*/public int getUnits(){return units;}/***The getDescription method returns the description of*the item.*@return The despription in the description field.*/public String getDescription(){return description;}/***The getPrice method returns the items price.*@return The value in the price field.*/public double getPrice(){return price;}}/***This program demostrates the RetailItem Class*/class RetailTest{public static void main (String [] args){String str ="Shirt";//Creates new RetailItem objects.RetailItem r1=new RetailItem ("Jacket", 12, 59.95);RetailItem r2=new RetailItem ("Designer Jeans", 40, 34.95);RetailItem r3 =new RetailItem ();//function call to set valuesr3.setDescription(str);r3.setUnits(20);r3.setPrice(24.95);//Output of dataSystem.out.println("\tDescription\t\tUnits on Hand\t\tPrice");System.out.println("Item#1\t"+r1.getDescription()+ " \t\t\t "+r1.getUnits()+ " \t\t\t " + r1.getPrice());System.out.println("Item#2\t"+r2.getDescription()+ " \t "+r2.getUnits()+ "\t\t\t\t" + r2.getPrice());System.out.println("Item#3\t"+r3.getDescription()+ " \t\t\t "+r3.getUnits() +" \t\t\t " + r3.getPrice());//Exit programSystem.exit(0);}}
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