Timbits Are Elementary Particles

(I am working drive-thru in a popular Canadian coffee shop. A lady pulls up to the speaker and orders a box of twenty timbits. She asks to have the box divided into three bags. I tell her we can do this, but then she goes on and on and about how each bag needs to be exactly the same. Normally, I would tell my coworker to just put seven into each bag, but she is being insufferable, so I ring in a box of twenty timbits plus one timbit extra.)

Customer: “What is this? What are you charging me the extra timbit for?! I asked for twenty timbits to be divided equally between three bags!”

Me: “Well, ma’am, as you already know, twenty can’t be divided equally by three, so we had to charge you for one extra one.”

(I thought she was going to implode. I had never seen someone turn that shade of red before.)