The following balances are taken from the unadjusted trial balance of Pender Inc. at its year- end, December 31, 2017. Account Balances Debit Credit Accounts Receivable $150,000 Allowance for Doubtful Accounts $ 1,500 Sales 500,000 Sales Returns and Allowances 50,000 An ageing of accounts receivable at December 31, 2017 reveals the following information: Accounts Estimated receivable, uncollectible Age Dec 31 percentage (days) 1-30 $ 50,000 2% 31-60 27,000 4% 61-90 40,000 5% 91-120 30,000 10% Over 120 3,000 50% Total $150,000 Required