Sustainable Supplies prepares the following aging of receivables analysis: Days Past Due Total Current 1 to 30 31 to 60 61 to 90 Over 90 Accounts receivable $ 57,600 $ 40,000 $ 9,000 $ 3,600 $ 2,000 $ 3,000 Percent uncollectible 1% 3% 5% 8% 11% Prepare the adjusting entry to record bad debts expense assuming the unadjusted balance in the Allowance for Doubtful Accounts is a $500 credit.