First of all, one must always be using logic or else you're a primal retard. Second, I gave an answer about giving a customer someones purchased item due to another employee having gave the current customers item to the the former customer.
I said to be an active listener and try to understand what the whole situation was about and try to work it out with the co-worker.
From what i gather it seems you have trouble interviewing . You can't go into an interview feeling nervous, you have to take control and show confidence. Costco is a face paced environment and the company itself looks for individuals that can't express the qualities necessary to get the job done.
When I was in the 7th grade my band teacher told me I should be able to play a different instrument my 8th grade year. I practiced over the summer but it was too difficult for me to learn a new instrument in just 3 months.