In Exercises 3 through 19, determine the output displayed when the button is clicked. (Check the assumptions when listed at the end of the exercise) 17. Private Sub btnDisplay Click(. ..) Handles btnDisplay.Click Dim cost As Double 250 DisplayBill (cost, ShippingCost (cost)) End Sub Function ShippingCost (costofGoods As Double) As Double Select Case costofGoods Case Is