Tasty Pastries, Inc., and other bakers refer to a "baker's dozen" as con?sisting of a collection of thirteen baked goods. This is an example of

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This is an example of usage of trade, which refers to a consistent practice or method used by professionals in a particular industry. In the baking industry, a "baker's dozen" commonly refers to thirteen baked goods instead of the standard twelve, and this practice is widely recognized and accepted.