A business has the following balances at the beginning of the year: Accounts receivable: 60000 Allowance for doubtful accounts: -9000 The following summary transactions occurred during the year. Sales for the year, 100% on credit: 100000 Cash collected on accounts receivable for the year: 104000 Write-offs of uncollectable accounts receivable: 7200 Received a cheque from a customer whose account was previously written off: 720 Overall rate used to estimate the allowance for doubtful accounts at year end: 14% Using the information above, answer the following questions. Enter the digits only. no dollar signs, commas, or decimal points. IMPORTANT - enter your answer to the second question (the balance in the allowance) as a NEGATIVE number, with a minus sign (-) in front of the digits. What is the balance in the accounts receivable account at year end? A What is the balance in the allowance for doubtful accounts at year end? A What is the balance in the bad debt expense account at year end