Inventory Combine System Problem

So I have been following tutorial on how to create an inventory system akin to the likes of Resident Evil for my own game:

I watched a separate tutorial from a different creator that followed a similar but rather different approach to creating an inventory using a Data Table, 2 item structs and 2 Actor Components. I have now essentially mashed both systems together to get to my current point which has worked up until now.

I have reached a point where now I’m aiming to implement a combine/item crafting system where 2 items can make something else: IE: Gunpower into ammo for instance.

Firstly: My container for my 2 Widgets of Inventory and Combine screen seems to return as none despite having promoted a variable/exposed on spawn/instance editable in the widget for my item slot where most of my scripts are for this system.

Secondly: I would appreciate some help on how to make the combine system work. I know from a logical sense it’s essentially Item A + Item B = Item C > Then remove Item A and B > Add Item C.

Any information or help regarding this would be greatly appreciated so thank you in advance!