The ledger of Sage Hill Inc. at the end of the current year shows Accounts Receivable $78,000; Credit Sales $855,000; and Sales Returns and Allowances $36,000. (a) If Sage Hill uses the direct write-off method to account for uncollectible accounts, journalize the adjusting entry at December 31, assuming Sage Hill determines that Matisse’s $750 balance is uncollectible. (b) If Allowance for Doubtful Accounts has a credit balance of $1,150 in the trial balance, journalize the adjusting entry at December 31, assuming bad debts are expected to be 9% of accounts receivable. (c) If Allowance for Doubtful Accounts has a debit balance of $450 in the trial balance, journalize the adjusting entry at December 31, assuming bad debts are expected to be 7% of accounts receivable.