I can not solve those ERRORS on RED. Please help me.

Public Class BillingForm Declare module-level constants Const TAX RATE Decimal As Decimal 0.08D : Const CAPPUCCINO PRICE Decimal As Decimal 2D Const ESPRESS0 PRICE Decimal As Decimal2.25D ' Const LATTE PRICE Decimal As Decimal 1.75D : Const ICED_PRICE_Decimal As Decimal 2.5D De v ry information. clare module-le el variables for summa : Private SubtotalDecimal, TotalDecimal, GrandTotalDecimal As Decimal Private CustomerCountInteger As Integer End Class O references Private Sub CalculateButton_Click(ByVal sender As System.Object, : "Calculate and display the current amounts and add to totals : Dim PriceDecimal, TaxDecimal, ItemAmountDecimal As Decimal ByVal e As System.EventArgs) Handles CalculateButton.Click : Dim QuantityInteger As Integer Find the price : If CappuccinoRadioButton.Checked Then ElseIf EspressoRadioButton.Checked Then Elself LatteRadioButton.Checked Then ElseIf IcedCappuccinoRadioButton.Checked Or PriceDecimal -CAPPUCCINO_PRICE_Decimal() :PriceDecimal ESPRESSO_PRICE_Decimal() : PriceDecimalLATTE_PRICE_Decimal() Public Class BillingForm Declare module-level constants Const TAX RATE Decimal As Decimal 0.08D : Const CAPPUCCINO PRICE Decimal As Decimal 2D Const ESPRESS0 PRICE Decimal As Decimal2.25D ' Const LATTE PRICE Decimal As Decimal 1.75D : Const ICED_PRICE_Decimal As Decimal 2.5D De v ry information. clare module-le el variables for summa : Private SubtotalDecimal, TotalDecimal, GrandTotalDecimal As Decimal Private CustomerCountInteger As Integer End Class O references Private Sub CalculateButton_Click(ByVal sender As System.Object, : "Calculate and display the current amounts and add to totals : Dim PriceDecimal, TaxDecimal, ItemAmountDecimal As Decimal ByVal e As System.EventArgs) Handles CalculateButton.Click : Dim QuantityInteger As Integer Find the price : If CappuccinoRadioButton.Checked Then ElseIf EspressoRadioButton.Checked Then Elself LatteRadioButton.Checked Then ElseIf IcedCappuccinoRadioButton.Checked Or PriceDecimal -CAPPUCCINO_PRICE_Decimal() :PriceDecimal ESPRESSO_PRICE_Decimal() : PriceDecimalLATTE_PRICE_Decimal()