For reference in explanation, refer to the book Intermediate Accounting Volume 1 by Conrado Valix

1. What are the three methods of estimating doubtful accounts? 2. Explain the aging method of estimating doubtful accounts. 3. Explain the percentage of accounts receivable method of estimating doubtful accounts. 4. Explain why the aging method and percentage of accounts receivable are known as "statement of financial approach". 5. Explain the percentage of sales method of estimating doubtful accounts. 6. Explain why the percentage of sales method is known as "income statement approach". "7. When is an account past due? 8. Explain the treatment of an inadequate or excessive allowance for doubtful accounts. 9. Is a debit balance in the allowance for doubtful accounts possible? 10. What does a debit balance in the allowance for doubtful accounts indicate