The last-ever penny will be minted today in Philadelphia

>But with 20 million customers a year, and 17% of them paying with cash, the policy will eventually cost Kwik Trip a couple of million dollars a year, McHugh said.

If we figure two-fifths of cash transactions need to be rounded up and the store is losing an average of 1.5 cents each time, their expected losses would be around $2,000, yeah?

I get $20,400 (20m * 17% * 40% * 0.015). But that's still nothing for a company that does 20 million POS transactions a year.