alderwood company has provided the following information prior to any year-end bad debt adjustment: cash sales, $452,000 credit sales, $1,356,000 selling and administrative expenses, $336,000 sales returns and allowances, $96,000 gross profit, $1,476,000 accounts receivable, $336,000 sales discounts, $48,000 allowance for doubtful accounts credit balance, $3,680 alderwood estimates bad debt expense assuming that 1.5% of credit sales have historically been uncollectible. how much is alderwood's bad debt expense?