For the fiscal year ending 30-06-2021, the financial details of RST Corp. are as follows:

Current Assets:

• Cash: $1,90,000
• Sundry debtors: $4,80,000
• Short term investment: $3,30,000
• Stock: $20,00,000
• Prepaid expenses: $40,000

Current Liabilities and Equity:

• Current liabilities: $9,50,000
• 8% Debentures: $17,00,000
• Equity share capital: $23,00,000
• Retained earnings: $9,50,000

Profit & Loss Statement:

• Sales (30% cash sales): $75,00,000
• Less: Cost of goods sold: $52,00,000
• Profit before interest & tax: $23,00,000
• Less: Interest: $2,90,000
• Profit before tax: $20,10,000
• Less: Tax @28%: $5,63,000

Net Profit: $14,47,000

Calculate: (i) Quick ratio, (ii) Fixed charge coverage ratio, (iii) Return on net worth, and (iv) Receivables turnover ratio.