At the end of the current year, the accounts receivable account has a debit balance of $984,000 and sales for the year total $11,160,000.The allowance account before adjustment has a debit balance of $13,300. Bad debt expense is estimated at 1/2 of 1% of sales.The allowance account before adjustment has a debit balance of $13,300. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $42,600.The allowance account before adjustment has a credit balance of $6,300. Bad debt expense is estimated at 1/4 of 1% of sales.The allowance account before adjustment has a credit balance of $6,300. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $52,300.Determine the amount of the adjusting entry to provide for doubtful accounts under each of the assumptions (a through d) listed above.