Complex sentence: The base currency of the United States is the U.S. dollar, and it is printed on bills in seven denominations of $1, $2, $5, $10, $20, $50, and $100.
Split into simpler sentences: The base currency of the United States is the U.S. dollar. It is printed in bills in seven denominations: $1, $2, $5, $10, $20, $50, and $100.