F. Share-based compensation:

Option activity under the Company’s stock option plans during the six months ended December 31, 2011 was as follows:

The fair value of options granted under the Company’s stock option plans was estimated on the date of grant using the Black-Scholes option-pricing model with the following assumptions used:

The dividend yield is based on the Company’s historical annual cash dividend divided by the market value of the Company’s Common Stock. The expected annualized volatility is based on the Company’s historical stock price over a period equivalent to the expected life of the option granted. The risk-free interest rate is based on U.S. Treasury constant maturity interest rates with a term consistent with the expected life of the options granted. Separate groups of employees that have similar historical exercise behavior with regard to option exercise timing and forfeiture rates are considered separately in determining option fair value.

The weighted average per share fair value of options granted during the quarter and six months ended December 31, 2011 was $15.68 and $14.90, respectively. The weighted average per share fair value of options granted during the quarter and six months ended December 31, 2010 was $15.70 and $15.02, respectively. The total intrinsic value of options exercised during the six months ended December 31, 2011 was $34,000. No options were exercised during the quarter ended December 31, 2011. The total intrinsic value of options exercised during the quarter and six months ended December 31, 2010 was $1.5 million and $1.8 million, respectively. The total fair value of options vested during the quarter and six months ended December 31, 2011 was $627,000 and $698,000, respectively. The total fair value of options vested during the quarter and six months ended December 31, 2010 was $628,000 and $677,000, respectively.

Stock-based compensation cost of $858,000 and $1.1 million was included in selling, general and administrative expense for the quarter and six months ended December 31, 2011, respectively. Stock-based compensation cost of $714,000 and $850,000 was included in selling, general and administrative expense for the quarter and six months ended December 31, 2010, respectively. Compensation cost is recognized using a straight-line method over the vesting period and is net of estimated forfeitures. As of December 31, 2011, there was $2.3 million of total unrecognized compensation cost related to non-vested stock options. The weighted average period over which the compensation cost is expected to be recognized is 1.4 years.