Three 6-packs of Charmin Ultra Gentle Mega Roll drops from $32.97 to $19.99 at Amazon, getting you a total of 18 rolls. This is the equivalent of 72 regular-sized rolls. A six-pack of mega rolls is $7-$11 at most retailers, so 18 rolls would cost you $21-$33 if bought elsewhere. Prime members get free shipping. Non-members get free shipping at $25, otherwise, it adds $5.99.