My Scenario at Albertsons:
Huggies are part of the Box Tops Promo where you spend $20 and Save $5 on your next order. I bought Huggies and 1 filler item to get me to $20 and then saved $5 on my next order.

{BUY 1} Huggies Big Pack Diapers 36-96 ct. $18.99
-Use the $1.50/1 from 8/16
-$1.50/1 – Huggies Product – (coupons.com)
-$1.50/1 – Huggies Diapers – (smartsource.com)
Final Price: $12.74
Huggies Snug and Dry 96 Diapers, Size 3, 13
¢ each
Huggies Snug and Dry 82 Diapers, Size 4, 16¢ each
Huggies Snug and Dry 70 Diapers, Size 5, 18¢ each
Huggies Snug and Dry 60 Diapers, Size 6, 21¢ each

{BUY 1} Cascadian Farms Granola 12.5-17 oz. $3.00
$1.00/1 – Cascadian Farms Products – (coupons.com)
Final Price: $1.25

Save $5 on your NEXT shopping order

PLUS get 50 Bonus Box Tops
Total OOP: $19.89

How does that compare to Costco prices?

Huggies Boxes, $41.09 each
Size 2, 258 diapers, .16 each
Size 3, 224 diapers, .18 each
Size 4, 200 diapers, .21 each
Size 5, 176 diapers, .23 each
Size 6, 144 diapers, .29 each
(thanks to pinching your pennies for the Costco prices)