Estimating Allowance for Doubtful Accounts Kirchhoff Industries has a past history of uncollectible accounts, as shown below. Age Class Percent Uncollectible Not past due 1-30 days past due 31-60 days past due 61-90 days past due Over 90 days past due Estimate the allowance for doubtful accounts, based on the aging of receivables schedule below. Kirchhoff Industries Aging of Receivables Schedule Customer Subtotals Conover Industries Keystone Company Moxie Creek Inc. Rainbow Company Swanson Company Totals Percentage uncollectible Balance Not Past Due 1-30 Days Past Due 31-60 Days Past Due 61-90 Days Past Due Over 90 Days Past Due 647,800 382,200 142,500 58,300 32,400 32,400 14,800 14,800 18,300 18,300 8,100 8,100 7,800 7,800 29,800 29,800 726,600 412,000 150,300 66,400 50,700 47,200 2% 5% 25% 35% 50% Allowance for Doubtful Accounts