Here are my options (names) for the radio button:
I tried using this but it's giving me an error:
multiplier = Convert.ToDouble(radioButton1.SelectedItem.ToString());
'System.Windows.Forms.RadioButton' does not contain a definition for 'SelectedItem' and no extension method 'SelectedItem' accepting a first argument of type 'System.Windows.Forms.RadioButton' could be found (are you missing a using directive or an assembly reference?)
How do I set the value of the multiplier based on what the user set in the radio button?