It's already there.
45.70
4500 can be rounded only to 4500 to the nearest 100.
4500
4500
4500
4540
4500 can be rounded only to 4500 to the nearest 100.
4500
4500
4500
4540
4500
4500
4500
4500
4500
4496 rounded to the nearest 100 is 4500.
$65.16 rounded to the nearest dollar = $65 65.16 cents rounded to the nearest dollar = $1