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% 1-30 days past due 6 31-60 days past due 20 61-90 days past due 30 Over 90 days past due 45 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 Balance Not Past Due 1-30 Days Past Due 31-60 Days Past Due 61-90 Days Past Due Over 90 Days Past Due 699,800 412,900 154,000 63,000 35,000 34,900 12,800 12,800 20,100 20,100 5,800 5,800 10,200 10,200 23,100 23,100 771,800 436,000 164,200 68,800 55,100 47,700 1% 6% 20% 30% 45% Percentage uncollectible Allowance for Doubtful Accounts