Here are simplified financial statements for Phone Corporation in a recent year:

INCOME STATEMENT
(Figures in $ millions)
Net sales	$	13,200
Cost of goods sold		4,110
Other expenses		4,072
Depreciation		2,548
Earnings before interest and taxes (EBIT)	$	2,470
Interest expense		690
Income before tax	$	1,780
Taxes (at 35%)		623
Net income	$	1,157
Dividends	$	866

BALANCE SHEET
(Figures in $ millions)
	End of Year		Start of Year
Assets
Cash and marketable securities	$	90			$	159
Receivables		2,432				2,510
Inventories		192				243
Other current assets		872				937
Total current assets	$	3,586			$	3,849
Net property, plant, and equipment		19,983				19,925
Other long-term assets		4,226				3,780
Total assets	$	27,795			$	27,554
Liabilities and shareholders' equity
Payables	$	2,574			$	3,050
Short-term debt		1,424				1,578
Other current liabilities		816				792
Total current liabilities	$	4,814			$	5,420
Long-term debt and leases		6,769				6,654
Other long-term liabilities		6,188				6,159
Shareholders' equity		10,024				9,321
Total liabilities and shareholders' equity	$	27,795			$	27,554

Calculate the following financial ratios for Phone Corporation: (Use 365 days in a year. Do not round intermediate calculations. Round your final answers to 2 decimal places.)

1. Return on Assets - use average balance sheet figures

2. Return on Capital

3. Operating profit margin

4. Long-term debt ratio - used end of year balance sheet figures