Answer:
a. Credit balance in the Allowance for Doubtful Accounts and already balance in Allowance account = $300
Estimated Doubtful accounts and balance maintained with Allowance for Doubtful Accounts= $8,500
Amount added to the Allowance for Doubtful Accounts = $8,500 - $300
Amount added to the Allowance for Doubtful Accounts = $8,200
Ending balance maintained with Allowance for Doubtful Accounts = $8,500
b. Credit balance in the Allowance for Doubtful Accounts and already balance in Allowance account = $500
Estimated Doubtful accounts and balance maintained with Allowance for Doubtful Accounts = $1,000,000 * 2% = $20,000
Ending balance maintained with Allowance for Doubtful Accounts = $20,000 + $500 = $20,500