This is the number it should be with all those #1 singles, re-release, movie, promotion and discounts.
No it isn't. Because if she had sold this amount of albums she wouldn't have gotten 5 #1 singles, since selling more albums means selling less singles. Come on now. Y'all seem to think Katy should be judged to 80s and 90s album standards rather than modern day standards. That's not how the market works. There is a reason why singles hardly ever made it to platinum until recently.