Back when I used to work in grocery stores, people were incredibly predictable with what fresh produce they would buy. I'd like to think that having a culinary background and a good memory was what enabled me to be able to remember produce codes (or PLU's), but the truth is much of the time I was using the same seven to ten codes for the same seven to ten items on every customer's order.
Iceberg lettuce, celery, bananas, hot house tomatoes, green peppers, green onions, english cucumbers, granny smith apples, white button mushrooms...repeat repeat repeat. Those PLU's are so ingrained in my mind I still can recite them from memory.
Eating. Drinking. Sharing.