At the end of 2020, White Company had accounts receivable worth $20,000. Out of this $20,000, $2,000 was past due. White's allowance for doubtful accounts has credit balance of $200. Based on the aging of accounts receivable method, White estimates that 1% of current accounts and 10% of accounts past due are uncollectible. What is the amount of bad debt expense of White in 2020?

Group of answer choices

$280

$80

$180

$90