Count amount of item in stack added to inventory and update with that number counter

Hello, sorry if this question is easy for someone, but I cant understand how properly to build event graph.

So the task that I am aiming to complete is this:

  • we have money (you can find different amount of money in stack (like 200 money or 152 money in boxes, receive from quests, or sell items to vendors);
  • we have counter for achievement that have max value 200000.
  • I am aiming to do next thing:

when we found or receive via quest (as item reward) or via trade or found some amount of money, when those money item get to player inventory we must count amount of money in stack and after update the condition counter with the amount we received.

I created very simple structure on item money (its blueprint):

Can someone help please with block how to receive amount we receive and update it our condition counter.