How to check for an specific item in my inventory?

Hello. I have a problem with my shop system that for some reason I cannot check if I have an item in my inventory to sell it to the shop or not. This is my blueprint that i made with some of the help on the internet just to experiment for my studies. Also how can I even check if there is an item in the players inventory by just simply creating and master item (child blueprint items that i made from a master item) to the third person character. I have an inventory system with and inventory component and I was just wondering how can I check the inventory for the items so the player could sell the item if its in his/her inventory. Thanks!

Create an inventory structure to store specific types of items. When you add an item you get its type and store it in the correct container.