DEF Corporation provides the following information for the year ended December 31, 2023: | Sales Revenue | $600,000 | | Accounts Receivable | Beginning: $80,000, Ending: $100,000 | | Bad Debt Expense | $10,000 | | Cash Collections from Customers | $590,000 | Calculate the amount of revenue recognized on credit sales during the year, the net realizable value of accounts receivable, and analyze the company's credit management performance.