The following summarizes the aging of accounts receivable for Johnston Supplies, Inc. as of July 31 2019: Historical Uncollectible Number of Days Unpaid Not yet due 1-30 days past due 31-60 days past due Over 60 days past due Total Accounts Receivable $127,600 90,300 54,700 32,900 10% 16% 36% Required: a. The unadjusted balance of the Allowance for Doubtful Accounts of Johnston Supplies, Inc. is I credit balance in the amount of $29,277 on July 31, 2019. Prepare the required adjusting entry to record Bad Debt Expense for the year b. Johnston Supplies, Inc. writes off $3,191 of uncollectible accounts on August 15, 2019. Prepare the required adjusting entry to record c. Use a T-account to determine the account balance in the Allowance for Doubtful Accounts on August 15, 2019. the write-off