Williamson Distributors separates its accounts receivable into three age groups for purposes of estimating the percentage of uncollectible accounts. Accounts not yet due = $35,000; estimated uncollectible = 5%. Accounts 1–30 days past due = $10,500; estimated uncollectible = 15%. Accounts more than 30 days past due = $4,500; estimated uncollectible = 25%. Compute the total estimated uncollectible accounts.