Target has All Powercore laundry pacs [target.com]
, tub of 50 for $8.59.
If you buy 3 laundry items (say, 3 of these) you get a $10 gift card.
So $25.77 for 3 - $10.00 (gift card) = $15.77 for 150 pods. That's cheaper than Costco's Kirkland Signature pods.
(Yes, buying vats of liquid detergent can be even cheaper. However, these are portioned out -- bottled detergent can easily get overused meaning you get fewer loads than promised driving up the actual effective cost.)