I don't think you can. You need to store your inventory (items, quantity) in some array or dictionary. And then when you change layouts, you re-build your inventory using that data.
To automate and optimize this task you can create a function that fills the inventory with sprites using the data from the array/dictionary. And call this function from all your layouts.
Also, move the inventory area of the screen to a separate layer and set it as Global, so you don't have to duplicate it on other layouts.