Currently I am building a flow that will update the total quantity of an item based off of the quantity of the item that was ordered. I have a sharepoint list that has the total quantity of an item. Someone then places an order through a power app that populates into 2 new sharepoint lists. What I am trying to do is take the quantity from the ordered item and subtract it from the total quantity, and have it update in the sharepoint list that has the total information. Every item is linked to an "Item_Code", so that is how I am going to make sure it updates the right item. The problem is, i cannot figure out how to properly do this, any tips would be very helpful.