4.( ) In 2010 Wilkinson Company had net credit sales of $1,125,000. On January 1, 2010, Allowancefor Doubtful Accounts had a credit balance of $27,000. During 2010, $45,000 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 $300,000, what is the required adjustment to the Allowance for Doubtful Accounts at December 31, 2010?
(A)$30.000
(B)$112.500
(C) $ 48,000
(D) $ 45,000