Open the colfax Solution file contained in the clearlyvb2010/Chap12/colfax solution folder. Code the Add button's Click the event procedure so that the it adds the amounts entered by the user to an accumulator variable and then displays the variables value in the lblSales control. Use an arithmetic assinment operator to update the accumulator. Display the total sales with ah dollar sign and two decimal places. I have no idea how to code this add button.The code has to work for Visual Basic. Thank you.