True or false

13. Checks received from a customers are considered to be cash in the companys books.

14. A company prepares adjusting entries for debit memorandums but not for credit memorandums.

15. According to the Sarbanes-Oxley Act of 2002, only external auditors can provide bookkeeping services for the clients they audit.

16. Accounts receivable are shown on the balance sheet at their net receivable value.