And you don't even have to have coupons...
Cottonelle ULTRA (in the purple package) is part of a national catalina deal, printing at all stores that use catalina machines (Walgreens, Target, Food Lion, Harris Teeter, Kroger...etc) Buy 2 and get a $3 catalina good on your next purchase.
walgreens has the 12 ct package regularly priced at $5. In the monthly book, there is a $1 off coupon. When scanned, these coupon multiply themselves and subtract based on the quantity purchased.
Buy 2 Cottonelle Ultra @ $5/each
-walgreens $1/1 coupon (multiplies times 2)
Get back $3 catalina, good on your next purchase. (essentially making these $2.50 each)
There are also manufacturer coupons, which you can add to this deal, to bring your total down further.