Providing for doubtful accounts At the end of the current year, the accounts receivabie account has a debit balance of $910,000 and sales for the year total $10,320,000. a. The allowance account before adjustment has a debit balance of $12,300. Bad debt oxpetrse is estimated at 1/4 of 1% of 5 ales. b. The allowance account before adjustment has a debit balance of $12,300. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $39,400. c. The allowance account before adjustment has a credit balance of $7,700, Bad debt expense is estimated at 3/4cf1% of 5 ales. d. The allowance account before adjustment has a credit balance of $7,700. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $63,900. Determine the amount of the adjusting entry to provide for doubtful accounts under each of the assumptianis (a through d) listed above. a. b. d