Instead of treating each step as separate financial damage, the correct approach is to evaluate final state differences between what the store had and what it ended up with. Initially, the store had seventy dollars in inventory plus one hundred dollars in cash that is later restored through the transaction cycle. After the full sequence, the store is left with neither the seventy dollars in goods nor the thirty dollars in cash given as change.
This leaves a total loss equivalent to one hundred dollars in combined value, which represents the true net impact of the scenario. The simplicity of this answer often surprises people because the wording of the riddle is intentionally structured to create cognitive distraction and emotional overthinking. Human reasoning tends to focus on storytelling elements such as theft, intention, and moral judgment rather than pure numerical outcomes.
This narrative framing causes the brain to overanalyze each step as a separate financial event instead of a unified transaction outcome. As a result, many people become convinced that the problem is more complex than it actually is, leading to unnecessary calculations and confusion.