The Taipei company uses the percentage of accounts receivable method to estimate bad debts, and as of January 1, 2021, the amount of Allowance for Doubtful Accounts is $400 (debit balance). On March 1st, the customer Mr. Wang's payment of $15,000 could not be recovered, but on March 29th, the customer Mr. Wang paid part of the payment of $10,000, and the rest could not be paid. As of December 31 for the year, the balance of accounts receivable was 300,000 and estimated doubtful accounts were approximately 2% of net accounts receivable. Please try the above possible entries. (8%)