A company has the following account balances as of December 31: trade receivables: $100,000 current notes receivable: $200,000 other receivables (due in six months): $20,000 allowance for doubtful accounts: $20,000 Which amount should be reported as net receivables under current assets on the balance sheet? 

1. $100,000 
2. $300,000 
3. $320,000 
4. $340,000