VBMatrix

Private Sub IncomeButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles IncomeButton.Click
        ' Write the code to multiply the sales by the prices to find the income
        Dim row As Integer
        Dim column As Integer
        For row = 0 To 4
            income(row) = 0 'This is the bugfix. It resets the value before calculating because else you're adding up what was already there and the new values, which is not what you want.
            For column = 0 To 2
                income(row) = income(row) + (sales(row, column) * prices(column))
            Next
        Next
        DisplayIncome()
    End Sub
End Class