Multiple Checkboxes and enumeration C# .NET

I am having troubles getting my head wrapped around how this should be done. I have 3 check boxes on a form that are to be input into a constructor. I am creating a variable to pass this information into the constructor. Listed below some of the code

public enum Accessories
    {
        None,
        StereoSystem,
        LeatherInterior,
        StereoAndLeather,
        ComputerNavigation,
        StereoAndNavigation,
        LeatherAndNavigation,
        All
    }

        SalesQuote.Accessories accessoryChosen;

        if(!chkStereoSystem.Checked && !chkLeatherInterior.Checked && !chkComputerNavigation.Checked)
            {
                accessoryChosen = SalesQuote.Accessories.None;
            }
            else if(chkStereoSystem.Checked && !chkLeatherInterior.Checked && !chkComputerNavigation.Checked)
            {
                accessoryChosen = SalesQuote.Accessories.StereoSystem;
            }

Am sure there is an much cleaner way to do this.