Allowance for Doubtful Accounts has a debit balance of $900 at the end of the year (before adjustment), and bad debt expense is estimated at 1% of credit sales. If credit sales are $950,000, the amount of the adjusting entry to record the estimate of the uncollectible accounts
a. is $10,400
b. is $9,500
c. is $900
d. is $8,600