The cost for Filet Mignon at Costco can vary from store to store and location to location.
However I've seen Filet Mignon at my local Costco sell for different prices such as $14.00 per lb and up to $20.00 per lb.
The cost can change but I've never seen the Filet Mignon cost more than $20.00 per lb.
Although it's expensive Filet Mignon is very delicious and even makes great stews and soups.