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STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Feb. 28, 2017 | $ 2,416,400 | $ 8,549,000 | $ 15,499,800 | $ (11,247,800) | $ 15,217,400
Balance (in Shares) at Feb. 28, 2017 | 12,082,080 |  |  | 3,901,932 |
Exercise of stock options | $ 2,000 | 24,300 |  |  | $ 26,300
Exercise of stock options (in Shares) | 10,000 |  |  |  | 10,000
Purchases of treasury stock |  |  |  | $ (98,400) | $ (98,400)
Purchases of treasury stock (in Shares) |  |  |  | 20,138 |
Sales of treasury stock |  |  |  | $ 42,100 | 42,100
Sales of treasury stock (in Shares) |  |  |  | (9,602) |
Net earnings |  |  | 5,214,700 |  | 5,214,700
Balance at Feb. 28, 2018 | $ 2,418,400 | 8,573,300 | 20,714,500 | $ (11,304,100) | $ 20,402,100
Balance (in Shares) at Feb. 28, 2018 | 12,092,080 |  |  | 3,912,468 |
Exercise of stock options (in Shares) |  |  |  |  | 0
Purchases of treasury stock |  |  |  | $ (256,500) | $ (256,500)
Purchases of treasury stock (in Shares) |  |  |  | 25,171 |
Sales of treasury stock |  |  |  | $ 342,700 | 342,700
Sales of treasury stock (in Shares) |  |  |  | (40,641) |
Dividends paid |  |  | (1,227,900) |  | (1,227,900)
Dividends declared |  |  | (410,100) |  | (410,100)
Share-based compensation expense |  | 401,800 |  |  | 401,800
Net earnings |  |  | 6,678,400 |  | 6,678,400
Balance at Feb. 28, 2019 | $ 2,418,400 | $ 8,975,100 | $ 25,754,900 | $ (11,217,900) | $ 25,930,500
Balance (in Shares) at Feb. 28, 2019 | 12,092,080 |  |  | 3,896,998 |

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