More than the time of eight-year-olds is involved. think how often you have waited in line while the customers ahead of you fumbled through their pockets or purses for a fewexpletive deletedpennies. a trivial problem? yes, until you multiply your wasted seconds by the billions of cash transactions that take place in our economy each year. i estimate that all this penny-pinching wastes several hundred million hours annually. valuating that at, say, $10 an hour adds up to several billion dollars per year, which is more than enough to justify this column. is the evidence in this passage sufficient to support the authors argument that we should eliminate the penny?