Extras Inventory is a new feature MNASATI provided.
This new feature allows you to add stock to your store extras as you do for your products.
To add extras inventory follow these steps:
- after adding your products and liking their extras to them save all of the auction.
- go back to "Manage Product Page" and find the product you want, then under "Options", click on "Related Options"
- from the Related Options interface choose the option value that you want and write its stock value in the Quantity field
- click on "save" to save all of your actions.