Providing for doubtiul accounts At the end of the current year, the accounts recelvabie account has a debit balance of $681,000 and sales for the year total $7,720,000. a. The allowance account before adjustment has a debit balance of $9,200. Bad debt expense is estimated at 3/4 of 1% of soles. b. The allowance account before adfustment has a debit balance of $9,200. An aging of the accounts in the customer ledger indicates estimated doubtful actounts af $29,400. c. The allowance account before adjustment has a credit balance of $4,900. Bad debt expense is estimated at 1/4 of 1% of sales. d. The allowance account before adjustment has a credit balance of $4,900. An aging of the accounts in the customer ledger indicates estimated doubtful accounts of $40,700. Determine the amount of the adfusting entry to provide for doubtful accounts under each of the assumptions (o through d) listed above. a. b. c. d