I hope I'm posting in the correct forum.

I have the variable dblCalories += 19.5 which I am using in a For Next Loop. I need to have dblCalories start out at the number 39...NOT 19.5, and then add 19.5 to 39 and so on. Make sense I hope? Here is my code. IF you run it, you will see that it is showing 19.5 in the first output but what I need it to start out showing is 39...and then go up by 19 from there up. Thanks for any help.

Code:
Public Class Form1

    Private Sub btnRunDemo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRunDemo.Click
        Dim intCount As Integer     ' Loop counter
        Dim dblCalories As Double  ' To hold calories
        Dim strTemp As String       ' To hold output

        ' Initiate count at 5 and Step 5
        For intCount = 5 To 30 Step 5

            ' Calculate the calories of dblCalories.
            dblCalories += 19.5

            ' Create a string to display.
            strTemp = "The number of calories burned for " & intCount.ToString() & " minutes" &
                " is " & dblCalories.ToString()

            ' Add the string to the list box.
            lstOutput.Items.Add(strTemp)
        Next
    End Sub

    Private Sub btnClear_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnClear.Click
        ' Clear the list box.
        lstOutput.Items.Clear()
    End Sub

    Private Sub btnExit_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
        ' Close the form.
        Me.Close()
    End Sub
End Class