The financial data of ABC Corp. for the year ending 31-12-2018 is as follows:

	$
Cash	2,60,000
Sundry debtors	7,50,000
Short term investment	4,00,000
Stock	21,00,000
Prepaid expenses	45,000

Total current assets: $35,55,000

	$
Current liabilities	10,50,000
9% Debentures	14,00,000
Equity share capital	23,50,000
Retained earnings	12,00,000

Statement of Profit for the year ending 31-12-2018

	$
Sales (25% cash sales)	87,00,000
Less: Cost of goods sold	60,00,000
Profit before interest & tax	27,00,000
Less: Interest	2,80,000
Profit before tax	24,20,000
Less: Tax @25%	6,05,000

Net Profit: $18,15,000

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