Which one of the following statements is correct? Accounts receivable are valued on the balance sheet at the gross amount owed to the business by its customers at the end of the period When the percentage of sales method is used, the unadjusted balance for the allowance for doubtful accounts does not affect the bad debt expense recorded for a period Under the allowance method, you recognize bad debt expenses when account receivable are written off The percentage of receivables method provides the best matching of bad debt expense to the credit sales of a period