If it has a blue seal and the words National Currency, it's worth at least $60 even in worn condition. If it has only moderate wear that value could double.
The value of a 1918 series one dollar bill from the Federal Reserve Bank of New York can vary depending on its condition and rarity. It could be worth anywhere from a few dollars to several hundred dollars to a collector. It is recommended to have the bill evaluated by a currency expert or appraiser for an accurate assessment.
$50
There were no series letters on any 1929-dated US bills. A large "G" indicates that the bill was distributed through the Chicago Federal Reserve District. There's more information at the question "What is the value of a 1929 US 5 dollar Federal Reserve Note?"
Probably slightly over face value
"A" is the highest series letter for 1928 $50 Federal Reserve Notes. "K" is most likely the Federal Reserve District letter. The series letter, if any, on US bills is next to the date. Please see the question "What is the value of a 1928 US 50 dollar Federal Reserve Note?" for more information on values.
$100.00
There were no series letters on any 1929 US bills. You may be referring instead to the Federal Reserve District letter; "G" indicates your bill was distributed by the Chicago district. There's more information at the question "What is the value of a 1929 US 100 dollar Federal Reserve Note?"
$12 to $15, assuming average wear.
Grover Cleveland appeared on two different $20 bills, both printed in the 1914 series. There's more information at the question "What is the value of a 1914 US 20 dollar Federal Reserve Note?" For clarity, the bill was actually printed in Washington and was distributed by the Richmond Federal Reserve district.
In worn condition, face value only. If only slightly worn, $8 or so.
A date is needed. Please see the question "What is the value of a (date) US 20 dollar bill?" for more information.
That L indicates a Federal Reserve bank branch. The series 2003 $2 bill is worth $2.
As of 09/2008 auction prices are around $24.