Total Accounts Historica % Number of Days Unpaid Receivable Uncollectible Not yet due 1-30 days past due 31-60 days past due Over 60 days past due $128,400 91,100 55,500 33,700 5% 10% 16% 33% Required a. The unadjusted balance of the Allowance for Doubtful Accounts of Johnston Supplies, Inc. is a credit balance in the amount of $29,517 on July 31, 2019. Prepare the required adjusting entry to record Bad Debt Expense for the year b. Johnston Supplies, Inc. writes off $3,271 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 Allowance for Doubtful Accounts Required R