on December 31 2020 CNS co reported accounts receivable of 4300000 CNS co uses the aging method in determining bad debts the companys allowance for doubtful accounts has a beginning balance of 230000 the following table shows the corresponding bad debt percentage of Nickolai companys account receivable:

Age ar balance %uncollectible

45 days or less 45% 5%

46-90 days 30% 10%

Over 90 days 25% 15%

How much is the required allowance for doubtful accounts at December 31 2020

1. 387000

2. 157000

3. 617000

4. 230000