Determine the amount to be added to Allowance for Doubtful Accounts in each of the following cases and indicate the ending balance in each case. a. Credit balance of $500 in Allowance for Doubtful Accounts just prior to adjustment. Using the aging method, the balance of Allowance for Douberal Accounts is estimated as $7,150. Amount added Ending balance b. Credit balance of $500 in Allowance for Doubtful Accounts just prior to adjustment. Bad debe expense is estimated at 1% of credit sales, which totaled $1,176,000 for the year, Amount added Ending balance