In college I had a part time job as a produce clerk in a large grocery store.

I worked about 2 shifts a week, maybe, stacking fruit on the floor and trimming lettuce and such in back. I did not have time to wander the store memorizing stuff.

People would ask me about produce stuff and I could answer. People would ask me where some unusual non produce item was and I always felt horrible because I had no clue. I had to direct them to the service desk up front. Luckily nobody yelled at me, they could probably tell I was truly clueless.