The Cambridge economist Piero Sraffa returned to the classical economic meaning of surplus, but his concept differs from Marx's in at least three important ways: (1) The substance of Sraffa's surplus is not a claim on the surplus labour of others but a physical surplus, i.e. the value of physical output less the value of physical inputs used up to produce it, in abstraction from price changes (roughly, like a standard valuation in national accounts); (2) The magnitude of the surplus in ...
, Dream Maker (2009-present) How long does mayonnaise last? How long does Miracle Whip last? Unopened mayonnaise will last at least a week beyond a best by date, erring on the safe side. The shelf life of mayonnaise regardless of such things as the sell by date, use by date, or best before date is not very long.
Once opened, heavy whipping cream will stay relatively fresh in the refrigerator for one to two weeks, notes the Wisconsin Nutrition Education Program. After that, discard the cream. Even ultra-pasteurized whipping cream should be stored in the refrigerator once opened. Like standard pasteurized cream, it will last up to two weeks when stored at below 40 degrees Fahrenheit in a refrigerator. The ideal temperature range for storing dairy products, such as whipping cream, is between 34 and 38 F.