In 2014, Roso Carlson Company had net credit sales of $750,000. On January 1, 2014, Allowance for Doubtful Accounts had a credit balance of $18,000. During 2014, $30,000 of uncollectible accounts receivable were written off. Past experience indicates that 3% of net credit sales become uncollectible. What should be the adjusted balance of Allowance for Doubtful Accounts at December 31, 2014?

(a) $10,050.

(c) $22,500.

(b) $10,500.

(d) $40,500.