QRS Inc.'s financial statements for the year ended December 31, 2023, are as follows.

Balance Sheet as of December 31, 2023

• Cash: $310,000
• Marketable Securities: $200,000
• Accounts Receivable: $420,000
• Inventory: $550,000
• Prepaid Expenses: $70,000
• Property, Plant, and Equipment (Net): $2,000,000
• Total Assets: $3,550,000

Liabilities and Equity

• Accounts Payable: $350,000
• Short-term Loans: $250,000
• Long-term Debt: $1,000,000
• Common Stock: $1,300,000
• Retained Earnings: $650,000
• Total Liabilities and Equity: $3,550,000

Income Statement for the year ended December 31, 2023

• Revenue: $3,800,000
• Cost of Goods Sold: $2,200,000
• Operating Expenses: $900,000
• Interest Expense: $80,000
• Taxes (30%): $180,000
• Net Profit: $440,000

Evaluate QRS Inc.'s financial health from the perspectives of (i) liquidity, (ii) leverage, (iii) profitability, and (iv) efficiency.