Another way to compare today's apples to yesterday's oranges is by adjusting for "inflation." Everything from food prices to movie revenues are regularly adjusted for shifting currency values -- for example, $100 in 1980 would go as far as $290 would today. The difference, of course, is that music sales have fallen, not risen, since 2000. Adjusting for that contraction, Adele's projected first-week sales would be equivalent to her selling 7.59 million units in 2000.
