

It’s two cartons of eggs, each container is a dozen and a half. Eggs are normally in units of a dozen so keeping that as a consistent unit across multiple brands and styles makes sense. Costco normally indicates how many things are packaged together more than the overall total. It’s useful to know the format.
If it was on tray of 36 eggs the would have used 3 dozen and the indicator to keep it consistent with the standard unit of eggs.
Those still exist, you are just not invited to them 😛