Marconi Co. has the following information available for the current year: Net Sales $ 765,000 Bad Debt Expense 45,000 Accounts Receivable, Beginning of Year 135,000 Accounts Receivable, End of Year 70,000 Allowance For Doubtful Accounts, Beginning of Year 57,000 Allowance For Doubtful Accounts, End of Year 77,000 What was the amount of write-offs during the year?