At the end of the current year, the accounts receivable account has a debit balance of $918,000 and sales for the year total $10,400,000. a. The allowance account before adjustment has a debit balance of $12,400. Bad debt expense is estimated at 3/4 of 1% of sales. b. The allowance account before adjustment has a debit balance of $12,400. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $39,700. C. The allowance account before adjustment has a credit balance of $9,400. Bad debt expense is estimated at 1/4 of 1% of sales. d. The allowance account before adjustment has a credit balance of $9,400. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $78,000. Determine the amount of the adjusting entry to provide for doubtful accounts under each of the assumptions (a through d) listed above. a. C. J00