On January 31, 2018, Allowance for Doubtful Accounts has a credit balance of 25,000. During 2018, 32,000 of uncollectible accounts receivable were written off. Past experiences indicate that the allowance should be 10% of the balance in receivables. Net credit sales for 2018, $3,500,000. If the accounts receivable balance at December 31 was $360,000, what is a required adjustment to the Allowance for Doubtful Accounts at December 31, 2018?

A. $29,000

B. $36,000

C. $43,000

D. $6,000