We always buy in increments of $20 also. When we bought gas just this morning at the Texaco on the Dutch side going towards Mark's Place from Simpson Bay, there was a sign with the exchange rate (1.75 to 1) on the pump itself and the pump was in US dollars. Ed went inside, handed them a $20, and pumped his own gas. No problems.

Robin & Ed

One’s destination is never a place, but a new way of seeing things. - Henry Miller