This brings up the neat concept of 'butt change' which is a technique for dealing with irritating people, like the annoying clerk at the coffee shop who cannot remember how you take your coffee even though you are in there every day. Simply take the exact change for your coffee, and before you get dressed, put it in your butt for a couple of minutes, then take it out and put it in a different pocket from where you keep your change.
Then, when sourpuss rings up your coffee, hand over the butt change.
They won't know, and you'll feel a lot better.
You're welcome.