Merchant Tutorial

Does anyone know of any good blueprint merchant tutorial that shows how to buy and sell items. I am doing everything I can to follow this book but there’s something going wrong here, plus the way the book has it, the item will be purchased if the player has enough money just by clicking on the item, which I want the player to click buy. I’m not sure why but I believe what is going on is that the system does not recognize the item that is clicked. I apologize for any confusion and I’m not sure how to do a screenshot on the blueprint, but basically after the player clicks on the buy button it does a get data table row node with a get item off the row name and then off the out row I have the break ItemsData node. After that is the logic on player gold - cost, and then the condition etc. Any idea on a good tutorial or what needs to be fixed will be very helpful.

Thank you.