The financial records of MNO Corp. reveal the following for the fiscal year ending 30-09-2022:

Current Assets:

• Cash: $3,00,000
• Sundry debtors: $4,50,000
• Short term investment: $2,00,000
• Stock: $21,00,000
• Prepaid expenses: $35,000

Current Liabilities and Equity:

• Current liabilities: $7,50,000
• 10% Debentures: $20,00,000
• Equity share capital: $25,00,000
• Retained earnings: $15,00,000

Profit & Loss Statement:

• Sales (45% cash sales): $75,00,000
• Less: Cost of goods sold: $55,00,000
• Profit before interest & tax: $20,00,000
• Less: Interest: $2,25,000
• Profit before tax: $17,75,000
• Less: Tax @32%: $5,68,000

Net Profit: $12,07,000

Calculate: (i) Working capital turnover ratio, (ii) Long-term debt to equity ratio, (iii) Operating profit margin, and (iv) Inventory holding period.