I just check my Chase statement for when I had something to eat in Munich airport on 1/27. Lists the euro charge, the exchange rate for the date, and the US$ charged.
01/27 SISSI UND FRANZ E5 SAT MUENCHEN-FLUG 18.25
01/28 EURO 16.70 X 1.092814371 (EXCHG RATE)
The google calculator list the exchange rate for that day as 1.08981.
You mileage may vary.