Final answer:
A "baker's dozen" refers to thirteen baked goods and originated from regulations on the weight of bread in the 13th century.
Step-by-step explanation:
Bert's Bagels, Inc., and other bakeries refer to a "baker's dozen" as consisting of thirteen baked goods. The term "baker's dozen" originated in the 13th century when there were strict regulations on the weight of bread. Bakers would add an extra loaf to a dozen to ensure they met the weight requirement even if one loaf turned out to be smaller. This practice has continued over time and is now commonly used even though there are no longer strict regulations.
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