Idioms about moneys

Today's teacher tell me many idioms!

bread and butter - one's income, the source of someone's food
e.g. )The man's business is his bread and butter and he works very hard to make it successful.

bring home the bacon - to earn the family living, to earn a salary
e.g.) I have been working hard all month bringing home the bacon for my family.

chicken feed - a small amount of money
e.g.) The amount of money that I paid for the used car was chicken feed.

very interesting ;)