b. During 2018, credit sales were $1,507,000; sales discounts taken were $28,000; accounts receivable collected were $1,263,600; and accounts written off during the year totalled $30,000. Prepare the adjusting entry required on December 31, 2018, to estimate uncollectible receivables assuming it is based on the following aging analysis. (If no entry is required for a transaction/event, select "No journal entry required" in the first account field.) Expected Percentage Uncollectible December 31, 2018 Accounts Receivable $300,000 93,000 26,000 17,000 Age of Accounts Receivable Not due (under 30 days) 1 to 30 days past due 31 to 60 days past due Over 60 days past due 1% 4% 10% 60%