Wellington Corp. has outstanding accounts receivable totaling $5 million as of December 31 and sales on credit during the year of $25 million. There is also a debit balance of $20,000 in the allowance for doubtful accounts. If the company estimates that 8% of its outstanding receivables will be uncollectible, what will be the balance in the allowance for doubtful accounts after the year-end adjustment to record bad debt expense?

a.$2,000,000.

b.$380,000.

c.$400,000.

d.$420,000.