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4. In 2014, Roso Carlson Company had net credit sales of NT $7,500,000. On January 1, 2014, Allowance for Doubtful Accounts had a credit balance of NT $180,000. During 2014, NT\$300,000 of uncollectible accounts receivable were written off. Past experience indicates that 3% of net credit sales become uncollectible. What should be the adjusted balance of Allowance for Doubtful Accounts at December 31, 2014? (4 points) Except the previous term show separately the full transactions (3 points)