Problem 8-220 [LO 8-2) The following summarizes the aging of accounts receivable for Johnston Supplies, Inc. a s of July 31, 2019: Number of Days Total Accounts Historical % Uncollectible Receivable $ 128,00e 90,700 55,100 Unpaid Not yet due 1-30 days past due 31-60 days past due 10% 16% 35% Over 60 days past due 33,300 Required: a. The unadjusted balance of the Allowance for Doubtful Accounts of Johnston Supplies, Inc. is a credit balance in the amount of $29,397 on July 31, 2019. Prepare the required adjusting entry to record Bad Debt Expense for the year b. Johnston Supplies, Inc. writes off $3,231 of uncollectible accounts on August 15, 2019. Prepare the required adjusting entry to record the write-off c. Use a T-account to determine the account balance in the Allowance for Doubtful Accounts on August 15, 2019. Complete this question by entering your answers in the tabs below Required A Required B Required C Use a T-account to determine the account balance in the Allowance for Doubtful Accounts on August 15, 2019