Allowance for Doubtful Accounts has a credit balance of $5,500 at the end of the year, before adjustments. Sales for the year amounted to $950,000, and sales returns and allowances amounted to $50,000. If uncollectible accounts expense is estimated at 2% of net sales, the amount of the appropriate adjusting entry will be Select one: a. $19,000 b. $18,000 c. $20,000 d. $17,000