The man had some incidental expenses to square away.

NEWYORKER: Union Man

Companies have aggressively sent workers back out on the road, but stricter travel policies emphasize utility over luxury, with some companies billing employees for incidental expenses like in-flight snacks, checked-baggage fees and rental-car fuel surcharges if they forget to fill up the tank.

WSJ: More Companies Treat Business Travel Like Budget Travel

Parents might, for example, pay a large percentage of tuition, fees and books while the student picks up a portion of the tuition, plus all living expenses and incidental costs.

FORBES: Magazine Article