At the end of 2020, Cullumber Co. has an allowance for doubtful accounts of $40,000. On January 31, 2021, when it has accounts receivable of $620,000, Cullumber Co. learns that its $7,900 receivable from Tokarik Inc, is not collectible. Management authorizes a write off. What is the carrying amount of the accounts receivable (1) before the write off, and (2) after the write off? (1) Before the write off (2) After the write off