Use Variant Items-Create Variant Structure for Customer Order
Variant Rule
Variant structure will be configured by setting variant rule. Options and values are set on the top level module. All the lower level modules should be fully configured with the options set on the top level module. Click the Variant Rule button on the toolbar to display the Configuration dialog box to set values for the options on the top level module.
After configuring the variant structure, current configuration can be saved by clicking on Save button in Configuration dialog. ...