HI @AVTS ,
I am not exactly sure what you need here as (I assume) you have a couple of errors in the examples and a combo box normally displays a list if items (not a single value). I will cover both - firstly if you are after the single value 9839393, where the Label is 5449000200716 showing 'Full Cases', it would be
LookUp(
YourListName,
'Full cases' = YourLabelName.Text
).Material
if there was more than one matching item and you wanted a list of them, replace LookUp with Filter.
Please click Accept as solution if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider giving it Thumbs Up.