Comment is also a bit misleading. Costco contracts all of their products, or for a better on-topic example - their air conditioning installation.
It's the same with Home Depot. They don't "make" anything, they contract everything out (Home Depot-line tools, i.e. Ryobi, their flooring installations to some of the cheapest local installers, etc.).
It's the same with Home Depot. They don't "make" anything, they contract everything out (Home Depot-line tools, i.e. Ryobi, their flooring installations to some of the cheapest local installers, etc.).