Right now on Amazon you can get Cottonelle Ultra Toilet Paper Double Roll, White 176, 12 Pack (Pack of 4) for $26.01 when you order using subscribe and save. This makes it 54¢ per double roll or 27¢ per regular roll.
When you use subscribe and save, you are signing up for auto-deliveries on these products at the interval you select. However, if after you receive your order you decide not to continue with scheduled deliveries, you can cancel your Amazon Subscriptions at any time by going to your Amazon account and clicking on “Manage Subscribe and Save Items”.