I need a tutorial on how to do the following:

Using C#, create a Windows Presentation Foundation (WPF) application that accepts the total cost of a sale and the amount submitted by the customer. Calculate and display the correct change. If the cost exceeds the amount submitted, post a message to the user that they have not submitted enough money. The program should accept both the cost and the amount submitted and then calculate and display the results. The program should use Try/Catch statements to keep the program from crashing. The windows presentation foundation application should look like the following:

I need you to explain to me how to do everything, including creating the actual form itself and how to link the code, or post a link to an uploaded solution. Thank you!