Pharoah Medical manufactures hospital beds and other institutional furniture. The companys comparative balance sheet and income statement for 2019 and 2020 follow.

Pharoah Medical Comparative Balance Sheet As of December 31
		2020		2019
Assets
Current assets
Cash		$387,000		$417,400
Accounts receivable, net		1,075,000		776,500
Inventory		727,000		681,100
Other current assets		381,350		247,050
Total current assets		2,570,350		2,122,050
Property, plant, & equipment, net		8,651,785		8,439,645
Total assets		$11,222,135		$10,561,695
Liabilities and Stockholders Equity
Current liabilities		$3,162,000		$2,846,000
Long-term debt		3,702,600		3,892,600
Total liabilities		6,864,600		6,738,600
Preferred stock, $5 par value		58,900		58,900
Common stock, $0.25 par value		104,650		103,900
Retained earnings		4,193,985		3,660,295
Total stockholders equity		4,357,535		3,823,095
Total liabilities and stockholders equity		$11,222,135		$10,561,695

Pharoah Medical Comparative Income Statement and Statement of Retained Earnings For the Year
		2020		2019
Sales revenue (all on account)		$10,177,300		$9,613,900
Cost of goods sold		5,613,000		5,298,700
Gross profit		4,564,300		4,315,200
Operating expenses		2,840,300		2,634,200
Net operating income		1,724,000		1,681,000
Interest expense		300,300		308,650
Net income before taxes		1,423,700		1,372,350
Income taxes (30%)		427,110		411,705
Net income		$996,590		$960,645
Dividends paid
Preferred dividends		29,550		29,550
Common dividends		433,400		413,100
Total dividends paid		462,950		442,650
Net income retained		533,690		517,995
Retained earnings, beginning of year		3,660,295		3,142,300
Retained earnings, end of year		$4,193,985		$3,660,295

Calculate the following profitability ratios for 2020. (Round answers to 1 decimal place, e.g. 50.1%.)

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