My understanding is Walmart approches Manufacturer A and says we want to buy x zillion widgets at y dollars per wiget. Are you interested.
At that point it is up to the manufacturer to produce the contracted amount of merchandise within the contracted period of time.
Muzzy 3 packs at $15.00 - Proshop Muzzy 6 packs at $29.00 I don't see a difference other than the packaging. Do you?
Greg
"Getting close to the game is the joy of Bowhunting for me, the harvest is a bonus."

Live 15 ft Python after eating a small Antelope!