Definition: Given a real-life anecdote of a complex ethical situation, generate a suitable title that describes the main event/root cause of the situation. Imagine that the given text is a social media post, and you have to write the title of the post, so the users can decide to read the main text or not.
Input: So earlier tonight I made a trip to gamestop to trade in a game for store credit and take advantage of this buy 2 pre-owned games get 1 free deal they currently have going on. I got $20 store credit and the games I planned to buy were $40 and $25 respectively. This should have made my purchase around $45 total and include the third game for free.

However, the cashier that rang me up was new, as one of the other workers walked him through how to do trade-ins for the first time. As he was still familiarizing himself with the system, he messed up and scanned in two of the games I was getting (the $25 one and the intended free one) as trade-ins. This mistake ended up giving me an extra $11 store credit instead of charging me. This now made my total purchase under $10.

When I was told my total I was surprised, but didn't say anything as the initial relief of saving $35 seemed like a huge stroke of luck. I'm not familiar with Gamestop's employee policies or even if anyone noticed the mistake after I left, but I can't help but feel that this new guy might receive some type of punishment for his mistake.

Am I an asshole for just walking out and not correcting the mistake?

not correcting the new Gamestop cashier's mistake