At each calendar year-end, Mazie Supply Co. uses the percent of accounts receivable method to estimate bad debts. On December 31, 2017, it has outstanding accounts receivable of $54,000, and it estimates that 5% will be uncollectible. Prepare the adjusting entry to record bad debts expense for year 2017 under the assumption that the Allowance for Doubtful Accounts has:

(a) a $918 credit balance before the adjustment.

(b) a $270 debit balance before the adjustment.