How to create a functional supermarket cashier with blueprints

Hello everyone, I’m currently stuck on what to do on this blueprint. Below is what I did, I put a camera and defined that when interacting the game would set it as the player’s camera to assumes the position of sitting at the cashier.

Now I need to make it so that when passing in front of the red part there, it understands each object and calculates a value for this object according to a predefined table by me.

It needs to spawn a random static mesh that will be a product that I’m going to put up for sale.

Can anyone give me a way to go?

EX: I wanted something like the gas station cashier, is there any asset ready that has a plant that already does this?

EXEMPLE: Gas Station Simulator Gameplay - No Commentary Part 1: Getting Started - YouTube ( MIN 38:15 )