Book Sales - C# Visual Studio

Here's what I have so far but here are the directions first: "Write an application for Book Sales. The application allows the user to enter the total sales amount. All sales receive a 25% discount. Your application should calculate discount amount and discounted sales amount. Include a Calculate button, Clear button, and Exit button (I've included all 3). Make the Calculate button the default button" "Display all calculated values as currency. Align the numeric data appropriately. Assign access keys to each of the Buttons. Whenever the data is changed in the initial total sales textbox, the calculated values displayed form should be cleared" "Reset the focus at the end of the calculation event and the clear event" My work is below. Note: I am still new to C#. It'd be appreciated if a professional can help a future programmer out. Thanks. namespace FVTCBookSales { publicpartialclassfrmFVTCBookSales: Form { publicfrmFVTCBookSales() { InitializeComponent(); } // when the calculate button is clicked, privatevoidbtnCalculate_Click(objectsender, EventArgse) { // declare information your program cares about (there are 4 numbers you need) decimaltotal; decimaldiscount; decimalsubtotal; try { total = [login to view URL]([login to view URL]); discount = total * .25; } // get the one value the user types into the interface and convert it into a usable number // calculate the amount of the discount // calculate the final total // convert the amount of the discount and and the final total to strings and display back to the user // focus is set on [login to view URL](); } // when the clear button is clicked, clear the textbox privatevoidbtnClear_Click(objectsender, EventArgse) { [login to view URL] = ""; [login to view URL] = ""; // when the clear button is clicked, the focus remains on the textbox [login to view URL](); } // when the exit button is clicked, exit the application privatevoidbtnExit_Click(objectsender, EventArgse) { [login to view URL](); } } }