 The athletes continued along the back of the dog and entered the Olympic Stadium.During construction, the bill for the 1972 Olympics increased from the original estimate of $3.5 million to $63 million on the roof of the Olympic Stadium alone.The overall bill of $750 million, which was more than three times the amount Mexico spent on the 1968 games, resulted in unofficial posters of Waldi using the Olympic Tower as a Fire Hydrant.