Selected Financial Data from Alpha Corporation: December 31 Accounts 2019 2020 Cash 10.000 80.000 Marketable Securities 30.000 10.000 Accounts Receivable, net 50,000 150,000 Inventories 90.000 150.000 Land and Building, net 340,000 360,000 Notes payable - short-term 70,000 110,000 Accounts payable, Trade 20,000 40,000 Mortgage payable - long-term 270,000 280,000 For the Year Ended December 31 2019 2020 Cash Sales 1,800,000 1,600,000 Credit Sales 500,000 800,000 Cost of Sales 1,000,000 1,400,000 1. Alpha's Acid-test (Quick) ratio as of December 31, 2020 is 2 Alpha's current ratio at December 31, 2020 is 3. Alpha's receivable turnover for 2020 is_