Exercise 3-18 Calculating ratios; solve for unknowns [LO3-8] The current asset section of the Excalibur Tire Company's balance sheet consists of cash, marketable securities, accounts receivable, and inventories. The December 31, 2018, balance sheet revealed the following: Inventories Total assets Current ratio Acid-test ratio Debt to equity ratio $1,200,00e $4,200,000 2.40 1.40 1.8 Required: Determine the following 2018 balance sheet items: 1. Current assets 2. Shareholders' equity 3. ILong-term assets 4. Long-term liabilities