[The following information applies to the questions displayed below.] Carmack Company has credit sales of $2.60 million for year 2015. On December 31, 2015, the company's Allowance for Doubtful Accounts has an unadjusted credit balance of $18,389. Carmack prepares a schedule of its December 31, 2015, accounts receivable by age. On the basis of past experience, it estimates the percent of receivables in each age category that will become uncollectible. This information is summarized here December 31, 2015 Accounts Receivable Age of Expected Percent Uncollectible $520,000 208,000 41,600 20,800 4,160 Accounts Receivable Not yet due 1 to 30 days past due 31 to 60 days past due 61 to 90 days past due Over 90 days past due 1.15% 1.90 6.,40 32.25 67.00