A taxi fleet, from the phone call to the payout
It replaced a spreadsheet and a lot of phone calls. The line routes itself by who is on shift. The driver says the fare out loud while pulling away instead of typing it up at 4am. On Monday the week checks itself against the meter's export and the card reader's, and anything that disagrees turns into a line on the driver's screen naming the job and the difference.
Nobody marks a week finished by hand. It closes when nothing is open and the money has arrived.