Every year, Fred and Ethel would spend a day at the State Fair. Every year, Fred would say, "Ethel, I'd like to ride in that airplane." And every year, Ethel would say, "I know, Fred, but that airplane ride cost ten dollars, and ten dollars is ten dollars." One year, while they were at the fair, Fred said, "Ethel, I'm 74 years old. If I don't have a ride in that airplane this year, I may never get another chance." "Fred, that airplane ride cost ten dollars, and ten dollars is ten dollars," Ethel…