Crimson Inc. recorded credit sales of $750,000, of which $600,000 is not yet due, $100,000 is past due for up to 180 days, and $50,000 is past due for more than 180 days. Under the aging of receivables approach, Crimson Inc. expects it will not collect 1% of the amount not yet due, 10% of the amount past due for up to 180 days, and 20% of the amount past due for more than 180 days. The allowance account had a debit balance of $1,000 before adjustment. After adjusting for bad debt expense, what is the ending balance of the allowance account?

a $27,000.

b $28,000.

c $29,000.

d $26,000.