This is the feature from where you can update any item into any price list.
On clicking the Price List Setting
On clicking “Add Update Price List by Item”. We get the following
Select the Price-list Group in which you want to update the Item. Then select the item list, and then select the Item Group. As soon as you do so Touch is entered automatically. Then update it.
On opening the Price list group & selecting the price-list group you can see that the Item has been added to the specified group.