Given the following Java CashRegister class and driver:

public class CashRegister { private int customerCount; private int itemCount; private double payment; private double purchases; private double salesTaxRate; private double salesTaxTotal; public CashRegister(double rate) { customerCount = 0; itemCount = 0; payment = 0; purchases = 0; salesTaxRate = rate; salesTaxTotal = 0; }

public void recordPurchase(double amount) /** Calculate sales of tax free items. */ { purchases += amount; itemCount++; } public void recordTaxablePurchase(double amount) /** Calculate sales of taxable items. */ { recordPurchase(amount); double salesTax = amount * salesTaxRate / 100.0; salesTaxTotal += salesTax; } public void receivePayment(double amount) { payment += amount; } public int getCustomerCount() { return customerCount; } public int getItemCount() { return itemCount; } public double giveChange() { customerCount++; double change = payment - purchases - salesTaxTotal; payment = 0; purchases = 0; salesTaxTotal = 0; return change; } public double salesTotal() { /** Accumulate sales totals for customers. */ } public double totalSalesTax() { /** Accumulate tax totals for customers. */ } public String getReport() { System.out.println("******[Register Accounting Information]******"); String result = " Number of customers: " + getCustomerCount(); result = result + " " + "Number of items sold: " + getItemCount(); result = result + " " + "Sales total: $" + // accumulated sales total rounded to two decimals. result = result + " " + "Sales tax total: $" + // accumulated sales tax rounded to two decimals. return result; } public void reset() { customerCount = 0; itemCount = 0; } }

// driver for CashRegister

public class CashRegisterTester { public static void main(String[] args) { CashRegister register = new CashRegister(6.75); // 6.75 percent sales tax

// customer 1 register.recordPurchase(2.59); // Not taxable register.recordTaxablePurchase(34.45); // Taxable register.receivePayment(50.00); double change = register.giveChange(); System.out.println(change); System.out.println("Expected: $" + (50 - 2.59 - 1.0675 * 34.45)); System.out.println(); // customer 2 register.recordPurchase(2.97); // Not taxable register.recordTaxablePurchase(12.95); // Taxable register.receivePayment(20.00); change = register.giveChange(); System.out.println(change); System.out.println("Expected: $" + (20 - 2.97 - 1.0675 * 12.95)); System.out.println(); // print report of total number of customers and items sold System.out.println(); System.out.println(register.getReport()); System.out.println(); // customer 1 register.recordPurchase(5.47); // Not taxable register.recordTaxablePurchase(9.19); // Taxable register.receivePayment(20.00); change = register.giveChange(); System.out.println(change); System.out.println("Expected: $" + (20 - 5.47 - 1.0675 * 9.19)); System.out.println(); // customer 2 //register.recordPurchase(2.97); // Not taxable register.recordTaxablePurchase(58.93); // Taxable register.receivePayment(65.00); change = register.giveChange(); System.out.println(change); System.out.println("Expected: $" + (65.00 - 0 - 1.0675 * 58.93)); System.out.println(); // customer 3 register.recordPurchase(4.48); // Not taxable register.recordTaxablePurchase(12.90); // Taxable register.receivePayment(20.00); change = register.giveChange(); System.out.println(change); System.out.println("Expected: $" + (20.00 - 4.48 - 1.0675 * 12.90)); System.out.println(); // print report of total number of customers and items sold System.out.println(); System.out.println(register.getReport()); } }

Modify the CashRegister class and driver to account for the following missing methods (Sales total and Sales tax total). Display the following outcome:

******[Register Accounting Information]******

Number of customers: 2

Number of items sold: 5

Sales total: $52.96 // total rounded to two decimal places.

Sales tax total: $3.19 // sales tax total rounded to two decimal places.

*****************************************************************************************************

******[Register Accounting Information]******

Number of customers: 3

Number of items sold: 12

Sales total: $90.97 // total rounded to two decimal places.

Sales tax total: $ 5.47 // total rounded to two decimal places.

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