An example of something extra is a Bakers Dozen (item count of 13) compared to a normal Dozen (item count of 12)
cookies in a baker's dozen
2 and a third dozen. 2 and two thirteenth bakers dozen. a dozen is twleve a bakers dozen is 13
A bakers dozen =13
A baker's dozen is equal to 13. So there are 13 hot cross buns in a bakers dozen.
twelve, but a bakers dozen is thirteen
Yes
Never heard of "bakers score" and "bakers gross", a bakers dozen is 13 because bakers used to throw in an extra bun for example if you ordered 12 buns, a baker would throw in one more making it thirteen, a score is 20 and a gross is 144, so if you go with the "bakers dozen" rule I suppose you add one to a score and one to a gross.
13
Bakers dozen
13
bakers dozen