Use of parent item group defaults in child item group

I want to define the item defaults into parent group and wants to use in child group. There are multiple child groups created under same parent group.

For example -

  1. Supermarket - Is Group
    a. Grocery
    b. Fresh Products - Is Group
    i. Fruits
    ii. Vegetables
    c. Dairy

I want to define my item defaults at group level and not at the child level and wants to use the same in sales and purchase invoice.

Any suggestions?


It may help to say which default attributes for items you wish to set, globally.

I have similar problem too, in version-12.
In item group, I have set default cost center and income account, but in invoice, it does not automatically reflect that the item is sold using defined cost center and income account.