Update: PasswordChecker.java

Update: Main.java

Create: Main.java, PasswordChecker.java

Create: Logger.java, Main.java, SimpleLogger.java, SmartLogger.java

Create: Account.java, CreditAccount.java, Main.java, SimpleAccount.java

Update: Tax6.java

Update: TaxSystem.java

Update: Sale.java

Delete: new_file

Update: Expenditure.java

Update: Deal.java

Update: Tax15.java

Create: new_file

Delete: new_file

Create: new_file