Renaming a directory in MS-DOS is much like renaming a file use the ren or rename command to rename the directory. Because you cannot have a file and directory that have the same name you will not need to worry about mistakenly renaming a file instead of a directory, unless you're using wild characters.
Normal balance is the accounting classification of an account. It is part of double-entry book-keeping technique. An account has either credit (Abbrev. CR) or debit (Abbrev.
July '09, the month under consideration has 31 days. This gives the Average Daily Available Balance (ADAB) equal to: Average Daily Available Balance = $4050/31 = $130.65. You might be wondering whether this is correct given the account balance at the end was $300.