1. Use either a flowchart or pseudocode to plan the btnCalc_Click procedure, which should calculate and display both a 5% sales tax and the total due.
2. Open the Jacobson Solution.sln file contained in the VB2017\Chap03\Jacobson Solution folder. Enter the three Option statements in the Code Editor window. Code the btnCalc_Click procedure using variables and a named constant. Display the sales tax with a comma (if necessary) and two decimal places. Display the total due with a comma (if necessary), a dollar sign and two decimal places. Save the solution and then start and test the application. (If the sales amount is 500, the sales tax and total due are 25.00 and $525.00, respectively.)
3. Now professionalize your interface by coding the text boxs TextChanged and Enter event procedures. Save the solution and then start and test the application.