Tennstedt Company had the following stockholders' equity section:

Capital stock, par $10 (40,000 shares issued)	$400,000
Capital in excess of par value	115,000
Retained earnings, balance January 1, 2019	185,000
Revenues earned during 2019	800,000
Expenses (excluding income tax) incurred during 2019	640,000
Cash dividends declared and pain during 2019	60,000
Treasury stock (4,000 shares)	58,000
Income tax rate 30%

At what amount per share was the treasury stock purchased?

a.) $12.88.

b.) $10.00.

c.) $14.50.

d.) $15.00.

e.) Cannot determine with the information provided