Product of the public school system
The year is 1989. My mother gives my 16 year old brother $20 and a shopping list. She only needed a few things:
1/2 lb. of American cheese
1 lb. of ham
1 loaf of bread.
About a half hour later my brother returns with a ginormous amount of ham and cheese, no bread and no change. My mother looks at him and says “what happened, why did you buy so much ham and cheese?” My brother, very matter of factly, with a puzzled look on his face said to her “how was I supposed to know how much a “lib” is?”