Final answer:
Prenumbered documents are essential in ensuring all sales transactions are both billed and recorded accurately. They help in detecting omitted transactions and in preventing the inadvertent duplication of billing or recording.
Step-by-step explanation:
Prenumbered documents serve two main purposes in the context of billing and recording of sales. They are intended to help prevent the failure to bill or record sales transactions, and they help to prevent duplicate billings or recordings of the same sales transactions.
When documents such as invoices or sales receipts are prenumbered, it ensures that each transaction is accounted for because there is a sequential paper trail. If a document number is missing, it can be an indication that a transaction has not been billed or recorded, hence addressing issue 'A' in the options you've provided. Likewise, by having a unique number for each document, it prevents the same transaction from being billed or recorded more than once, hence avoiding issue 'B'.
Based on this explanation, the correct answer to the question would be: A. Y Y - Yes, prenumbered documents help prevent the failure to bill or record sales, and Yes, they help prevent duplicate billings or recordings of sales.