Zuo Software categorizes its accounts receivable into four age groups for purposes of estimating its allowance for uncollectible accounts.
1. Accounts not yet due = $400,000; estimated uncollectible = 8%.
2. Accounts 1–30 days past due = $50,000; estimated uncollectible = 15%.
3. Accounts 31–90 days past due = $40,000; estimated uncollectible = 30%
4. Accounts more than 90 days past due = $30,000; estimated uncollectible = 50%. At 12/31/2021, before recording any adjustments, Zuo has a credit balance of $22,000 in its allowance for uncollectible accounts.

Required:
1. Estimate the appropriate 12/31/2021 balance for Zuo’s allowance for uncollectible accounts.
2. What journal entry should Zuo record to adjust its allowance for uncollectible accounts?
3. Calculate Zuo’s 12/31/2021 net accounts receivable balance.