In total, they're worth $400.
$1 each
If they're modern notes, they're only worth face value. It's not uncommon to get consecutive new bills at the bank.
$100
$20, American.
Count how many you have. That's how much they're worth.
If they're modern bills (1976 or later) the fact that they're consecutive doesn't add much to the value. Uncirculated ones would sell for about $3, and anything with wear would sell for face value or a few cents more.
Together, $60.00. However, some collectors might offer you a bit more for the novelty of it.
Even individually these bills would be worth $5 or more each. You would need to have a currency dealer appraise the worth of a consecutive set.
Uncirculated bills retail for about $3. Circulated bills are only worth face value.
How much is a 1000 pesos date 1985 worth
How much is master p worth in 2009?
1 Ton of dollar bills is $907,184