Friction Math
I stood at the returns counter of a big-box hardware store last Tuesday, holding a copper pipe cutter that I didn’t actually need. I had purchased it in a fit of optimistic DIY-fever three weeks prior, but the project had evolved, and the tool remained in its plastic clamshell, mocking me from the passenger seat of my truck.
I didn’t have the receipt. I assumed, with a level of arrogance that only a regular customer can possess, that my presence and the obvious novelty of the item would be enough to bypass the bureaucracy.
The clerk, a woman named Sharon whose name tag was slightly crooked, did not care about my work boots or my history with the store. She followed a flow chart. No receipt meant no refund. I spent arguing for a credit of eighteen dollars.
When I finally walked back to my truck, still holding the pipe cutter, I realized I had spent more in fuel and lost billable time than the tool was worth. I had committed a fundamental error in personal arithmetic. I had treated my own time as a free resource, and in doing so, I had turned a minor inconvenience into a net loss.
The Arithmetic of the Wall
This is the same

