For a newborn, I agree it is less than 20 cents. I am buying 2s and get them for about 17 or 18 cents. As the kid gets bigger, the price stays the same but the # of diapers per box goes down. Also look carefully at the amount of diapers per package. It varies from store to store! Even if the packages look identical. Very sneaky!
Lastly sign up for all the free magazines and pampers and huggies newsletters. You get more coupons that way.
Karin