Pearl E. White Orthodontist specializes in correcting misaligned teeth. During 2018, Pearl provides services on account of $572,000. Of this amount, $62,000 remains receivable at the end of the year. An aging schedule as of December 31, 2018, is provided below. Amount Receivable Estimated Percent Uncollectible Age Group Not yet due 0-90 days past due 91-180 days past due More than 180 days past due $22,000 4,200 9,200 16,600 5% 10% 30% 80% Total $62,000