A 'case' of some
merchandise is a collection of items packaged together. In the United States, typically a standard case contains a certain number of items depending on what the merchandise is. For consumer foodstuffs such as
canned goods,
soda,
beer,
cereal and such, a case is typically 24 items. For larger bottles such as gallon jugs, a case is typically 4. Cases of
video tape are typically packed 10 to a case, and so on.