Alas, the original joke isn't mine. A textual form appeared in Phaic Tăn in The Jetlag Travel Guide Series, which is a parody of travel guides.
When I was in Vietnam, bargaining on the street was a bit like this. Without any common language, the vendor and I passed a calculator back and forth with offers and counteroffers.
When I was in Vietnam, bargaining on the street was a bit like this. Without any common language, the vendor and I passed a calculator back and forth with offers and counteroffers.