Teeter Company began 2017 with accounts receivable of $400,000 and an allowance for uncollectible accounts of $20,000 (credit balance). Bad debt expense for the year was $33,000 and the ending balance in the allowance for uncollectible accounts account was $15,000. What was the amount of accounts receivable written off during the year? A) $38,000 B) $405,000 C) $438,000 D) $5,000