In 2022 the Splish Brothers Inc. had net credit sales of $1020000. On January 1, 2022, the Allowance for Doubtful Accounts had a credit balance of $23100. During 2022, $34200 of uncollectible accounts receivable were written off. Past experience indicates that the allowance should be 10% of the balance in receivables (percentage-of-receivables basis). If the accounts receivable balance at December 31 was $242000, what is the required adjustment to the Allowance for Doubtful Accounts at December 31, 2022