Estimating Allowance for Doubtful Accounts Kirchhoff Industries has a past history of uncollectible accounts, as follows. Age Class Percent Uncollectible Not past due 2% 1-30 days past due 4 31-60 days past due 18 61-90 days past due 40 Over 90 days past due 75 Estimate the allowance for doubtful accounts, based on the aging of receivables schedule below. Kirchhoff Industries Estimate the Allowance for Doubtful Accounts Balance Not Past Due Days Past Due 1-30 Days Past Due 31-60 Days Past Due 61-90 Days Past Due Over 90 Subtotals $1,050,000 $600,000 $220,000 $115,000 $85,000 $30,000 Conover Industries 30,000 30,000 Keystone Company 18,000 18,000 Moxie Creek Inc. 9,000 9,000 Rainbow Company 26,400 26,400 Swanson Company 46,600 46,600 Total receivables 1,180,000 626,400 266,600 124,000 103,000 60,000 Percentage uncollectible 2% 4% 18% 40% 75% Allowance for doubtful accounts