Where Does the Extra Dollar Come From?

Front:
DOPE THIS ONE OUT I Deposit $50.00 in Bank Then I withdraw $20.00 Leaving $30.00 Then I withdraw $15.00 Leaving $15.00 Then I withdraw $ 9.00 Then I withdraw $ 6.00 Leaving $ 6.00 Leaving $.00 Total - - $50.00 $51.00 WHERE DOES THE EXTRA DOLLAR COME FROM?

Back:
r-Kodak L-Paper- F