marconi company has the following information available for the current year: net sales $ 1,147,500 bad debt expense 91,800 accounts receivable, beginning of year 367,200 accounts receivable, end of year 183,600 allowance for doubtful accounts, beginning of year 64,260 allowance for doubtful accounts, end of year 94,860 what was the amount of write-offs during the year?