Zomg, I had this issue at an event the other day.

It's a baseball game with pizza food trucks. When you arrive you are given 10 tickets which effectively work like cash.

Go to the food truck, order and give tickets. Easy.

There are only two trucks because some had to back out. Lines are long, I'm in line for about 45 minutes, but I'm watching a baseball game nearby so no big deal. Truck I'm at has a giant sign "pepperoni or cheese 4 tickets".

By the time the people just in front of me get to the order taker I hear the conversation

Lady: "I don't know how many tickets I have, how much pizza I can order, but I want 16 pieces of cheese".

Order taker: "you have 40 tickets"

Lady: "what does that mean?"

45 minutes in line specifically for food, she doesn't read the sign, count her tickets, prepare a plan, nothing.