Matthias Medical manufactures hospital beds and other institutional furniture. The companys comparative balance sheet and income statement for 2012 and 2013 follow.

Matthias Medical Comparative Balance Sheet As of December 31
		2013		2012
Assets
Current assets
Cash		$333,000		$417,500
Accounts receivable, net		1,066,900		776,450
Inventory		738,000		681,100
Other current assets		393,000		247,050
Total current assets		2,530,900		2,122,100
Property, plant, & equipment, net		9,093,850		8,406,875
Total assets		$11,624,750		$10,528,975
Liabilities and Stockholders Equity
Current liabilities		$3,166,000		$2,846,000
Long-term debt		3,702,650		3,892,700
Total liabilities		6,868,650		6,738,700
Preferred stock, $5 par value		59,300		59,300
Common stock, $0.25 par value		122,000		103,850
Retained earnings		4,574,800		3,627,125
Total stockholders equity		4,756,100		3,790,275
Total liabilities and stockholders equity		$11,624,750		$10,528,975

Matthias Medical Comparative Income Statement and Statement of Retained Earnings For the Year
		2013		2012
Sales revenue (all on account)		$10,730,000		$9,613,900
Cost of goods sold		5,563,000		5,298,750
Gross profit		5,167,000		4,315,150
Operating expenses		2,840,250		2,634,200
Net operating income		2,326,750		1,680,950
Interest expense		318,000		308,700
Net income before taxes		2,008,750		1,372,250
Income taxes (30%)		602,625		411,675
Net income		$1,406,125		$960,575
Dividends paid
Preferred dividends		29,450		29,450
Common dividends		429,000		469,000
Total dividends paid		458,450		498,450
Net income retained		947,675		462,125
Retained earnings, beginning of year		3,627,125		3,165,000
Retained earnings, end of year		$4,574,800		$3,627,125

Calculate the following profitability ratios for 2013. (Round answers to 1 decimal place, e.g. 50.1%.)

a.	Gross margin percentage		%
b.	Return on assets		%
c.	Return on common stockholders equity		%