
Answer:
allowance for bad debt 9,650 debit
      Account receivables 9,650 credit
bad debt expense   11,264 debit
    allowance for bad debt  11,264 credit
the bad debt expense would not change as it is not determnate based on the adjustment of an estimate uncollectible account but, in the percentage of sales which will fail to met the payment.
Explanation:
estimated bad debt:
512,000 x 2.2% = 11,264‬