In 2021. Warehouse 13 had net credit sales of $758000. On January 1, 2021, Allowance for Doubtful Accounts had a credit balance of \$16070. During 2021, $28980 of uncollectible accounts receivable were written off. Past experience indicates that the allowance should be 10% of the balance in receivables (percentage of receivable basis). If the accounts receivable balance at December 31 was $145000, what is the required adjustment to the Allowance for Doubtful Accounts at December 31,2021 ? $28980$145000$30570$27410