Net Price Calculation
 Introduction
 Items in a department store or any other store usually display the price of an item. Customers take such an item to the cashier who rings it, applies the tax rate and present the total price to the customer. The marked price, the price presented on an item, is in currency value. In this example, it would be \$120.95 The tax rate is expressed as a percentage value. An example would be 5.75% The computer used to evaluate the price use a formula such as: Tax Amount = Marked Price / Tax Rate The net price, the actual price a customer should pay, is calculated as: Net Price = Marked Price + Tax Amount In this exercise, we will simulate such a calculation
 Starting the Application
 Start Microsoft Visual Studio or Microsoft Visual C++. On the main menu, click File -> New To create the project, from the New dialog box, click the Projects property sheet Click MFC AppWizard (exe) In the Project Name edit box, type NetPrice and click OK In the MFC AppWizard  Step 1, click the Dialog Based radio button and click Next In the MFC AppWizard  Step 2 of 4, in the edit box, type Net Price and click Next In the MFC AppWizard  Step 3 of 4, click the No Thanks radio button and click Finish and click OK

 Designing the Application
1. On the dialog box, click the TODO line and press Delete
2. On the Dialog toolbar, click the Toggle Grid button .
3. Design the dialog box as follows:

4. Set the IDs of the Edit controls to
 1 IDC_MARKED_PRICE 2 IDC_TAX_RATE 3 IDC_TAX_AMOUNT 4 IDC_NET_PRICE
5. Remember to add the Calculate button
 ```void CNetPrice1Dlg::OnBtnCalculate() { // TODO: Add your control notification handler code here double MarkedPrice, TaxRate, TaxAmount, NetPrice; MarkedPrice = atof(m_MarkedPrice); TaxRate = atof(m_TaxRate) / 100; TaxAmount = MarkedPrice * TaxRate; NetPrice = MarkedPrice + TaxAmount; m_TaxAmount.Format("\$%.2f", TaxAmount); m_NetPrice.Format("\$%.2f", NetPrice); UpdateData(FALSE); }```