The following summarizes the aging of accounts receivable for Johnston Supplies, Inc. as of July 31, 2019: 1-30 days past due 31-60 days past due Over 60 days past due 128,400 91,100 55,500 33,700 58 104 168 338 Required a. The unadjusted balance of the Allowance for Doubtful Accounts of Johnston Supplies, Inc. is a credit balance in the amount of b. Johnston Supplies, Inc. writes off $3,271 of uncollectible accounts on August 15, 2019. Prepare the required adjusting entry to recora 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 8 Required C of the nce in the amount of The unadjusted balance $29,517 on July 31, 2019. Prepare the required adjusting entry to record Bad Debt Expense for the year