OB,4 r nts, EX 9-9 Estimating allowance for doubtful accounts Waddell Industries has a past history of uncollectible accounts, as follows. Estimate the allowance for doubtful accounts, based on the aging of receivables schedule you com- pleted in Exercise 9-8. Age Class Not past due 1-30 days past due 31-60 days past due 61-90 days past due Over 90 days past due Percent Uncollectible 3% 4 15 35 80 OB,4 r nts, EX 9-9 Estimating allowance for doubtful accounts Waddell Industries has a past history of uncollectible accounts, as follows. Estimate the allowance for doubtful accounts, based on the aging of receivables schedule you com- pleted in Exercise 9-8. Age Class Not past due 1-30 days past due 31-60 days past due 61-90 days past due Over 90 days past due Percent Uncollectible 3% 4 15 35 80