Could someone please help me with this logic error??

[Richie]

The project should display a different amount if the new release check box and the dvd {or vhs} radio button are both checked, its displaying the regular price.

This is my code:

Option Strict On


Public Class videoBonanzaSaleForm
Inherits System.Windows.Forms.Form


' Declare Constants
Const DVD_PRICE_Decimal As Decimal = 2.5D
Const NEW_RELEASE_DVD_Decimal As Decimal = 3D
Const VHS_PRICE_Decimal As Decimal = 1.8D
Const NEW_RELEASE_VHS_Decimal As Decimal = 2D
Const DISCOUNT_RATE_Decimal As Decimal = 0.1D


' Declare module-level variables.
Dim customerCountInteger As Integer
Dim grandTotalDecimal, totalDecimal, itemAmountDecimal As Decimal



Private Sub calculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculateButton.Click
' Calculate and display the current amounts.


Dim priceDecimal, discountDecimal As Decimal


If titleTextBox.Text <> "" Then


If dvdRadioButton.Checked = True Or vhsRadioButton.Checked = True Then


' Find the price.
If dvdRadioButton.Checked Then
priceDecimal = DVD_PRICE_Decimal
ElseIf vhsRadioButton.Checked Then
priceDecimal = VHS_PRICE_Decimal
ElseIf newReleaseCheckBox.Checked And dvdRadioButton.Checked Then
priceDecimal = NEW_RELEASE_DVD_Decimal
ElseIf newReleaseCheckBox.Checked And vhsRadioButton.Checked Then
priceDecimal = NEW_RELEASE_VHS_Decimal
End If


' Calculate the extended price and add to order total.
If memberCheckBox.Checked Then
discountDecimal = priceDecimal * DISCOUNT_RATE_Decimal
Else
discountDecimal = 0
End If


itemAmountDecimal = priceDecimal - discountDecimal
totalDecimal += itemAmountDecimal


itemAmountLabel.Text = itemAmountDecimal.ToString("C")
totalLabel.Text = totalDecimal.ToString("C")
Else
MessageBox.Show("A Movies Format Must Be Selected", "Data Entry Error", _
MessageBoxButtons.OK, MessageBoxIcon.Error)
End If
Else
MessageBox.Show("A Title Must Be Entered.", "Data Enrty Error", _
MessageBoxButtons.OK, MessageBoxIcon.Error)
titleTextBox.Focus()
End If


' Allow a change only for a new order.
memberCheckBox.Enabled = False


' Allow clear after an order has begun.
clearButton.Enabled = True


' Reset format Radio Buttons and clear text box.
vhsRadioButton.Checked = False
dvdRadioButton.Checked = False
titleTextBox.Clear()


End Sub

[Iron_Cross]

Please use the code blocks next time :)

Option Strict On

Public Class videoBonanzaSaleForm
Inherits System.Windows.Forms.Form

' Declare Constants
Const DVD_PRICE_Decimal As Decimal = 2.5D
Const NEW_RELEASE_DVD_Decimal As Decimal = 3D
Const VHS_PRICE_Decimal As Decimal = 1.8D
Const NEW_RELEASE_VHS_Decimal As Decimal = 2D
Const DISCOUNT_RATE_Decimal As Decimal = 0.1D

' Declare module-level variables.
Dim customerCountInteger As Integer
Dim grandTotalDecimal, totalDecimal, itemAmountDecimal As Decimal


Private Sub calculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles calculateButton.Click
    ' Calculate and display the current amounts.

    Dim priceDecimal, discountDecimal As Decimal

    If titleTextBox.Text <> "" Then

        If dvdRadioButton.Checked = True Or vhsRadioButton.Checked = True Then

            ' Find the price.
            [b]If dvdRadioButton.Checked Then
                If newReleaseCheckBox.Checked Then
                    priceDecimal = NEW_RELEASE_DVD_Decimal
                Else
                    priceDecimal = DVD_PRICE_Decimal
                End If
            ElseIf vhsRadioButton.Checked Then
                If newReleaseCheckBox.Checked Then
                    priceDecimal = NEW_RELEASE_VHS_Decimal
                Else
                    priceDecimal = VHS_PRICE_Decimal
                End If
            End If [/b]

            ' Calculate the extended price and add to order total.
            If memberCheckBox.Checked Then
                discountDecimal = priceDecimal * DISCOUNT_RATE_Decimal
            Else
                discountDecimal = 0
            End If

            itemAmountDecimal = priceDecimal - discountDecimal
            totalDecimal += itemAmountDecimal

            itemAmountLabel.Text = itemAmountDecimal.ToString("C")
            totalLabel.Text = totalDecimal.ToString("C")
        Else
            MessageBox.Show("A Movies Format Must Be Selected", "Data Entry Error", _
            MessageBoxButtons.OK, MessageBoxIcon.Error)
        End If
    Else
        MessageBox.Show("A Title Must Be Entered.", "Data Enrty Error", _
        MessageBoxButtons.OK, MessageBoxIcon.Error)
        titleTextBox.Focus()
    End If

    ' Allow a change only for a new order.
    memberCheckBox.Enabled = False

    ' Allow clear after an order has begun.
    clearButton.Enabled = True

    ' Reset format Radio Buttons and clear text box.
    vhsRadioButton.Checked = False
    dvdRadioButton.Checked = False
    titleTextBox.Clear()

End Sub

The part I changed is in bold.
The problem was you were saying it like this:

1. IF It's a DVD or VHS THEN
    1a. IF It's a DVD THEN
        1a1. Set the it to regular DVD
    1b. IF it's a VHS THEN
        1b1. Set it to a regular VHS
    1c. IF It's a New DVD
        1c1. Then Set it to new dvd
    1d. IF It's a new VHS THEN
        1d1. Set it to a new VHS
2. END IF

Let's say a customer choose New Release VHS.
The computer would read through those instructions like this:

1. = True
1a. = False
1b. = True
1b1. it would set the value here
2. 

You were thinking it would go like this:

1. = true
1a. = false
1b. = true
1b1. set the value
1c. = false
1d. = true
1d1. re set the value
2.

Hope this helps explain it a bit :)