Aim: To test selected controls over the sales and accounts receivable process.Sample: We haphazardly selected 25 sales invoices from the entire year.Complete the following audit procedures: Match the quantities and products ordered on the invoices to the shipping document. If they match, mark all matching lines on both documents with the letter A. Check the shipping documents for a signature by the customer. If a signature is present, mark the signature with a B.Check the shipping document to determine