The infrastructure behind ATMs
It was a bit buried, but calls out an interesting fact I wish more people knew about business: cash has processing fees too.<p><i>If you deal with commercially relevant quantities of cash, in addition to your own labor costs associated with it, your bank will assess a fee for depositing it. Larger retailers will negotiate their own bespoke rates, but the right ballpark for small businesses above a nominal amount is 3 bps, or $3 per $10,000 transacted.</i>