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CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017
Net sales: |  |  |  |
Equipment revenues | $ 20,685 | $ 18,269 | $ 40,275 | $ 36,855
Service revenues | 4,144 | 2,843 | 7,930 | 5,431
Net sales | 24,829 | 21,112 | 48,205 | 42,286
Cost of sales: |  |  |  |
Equipment related expenses | 13,203 | 11,933 | 26,210 | 24,024
Service related expenses | 955 | 700 | 1,765 | 1,297
Cost of sales | 14,158 | 12,633 | 27,975 | 25,321
Gross Profit | 10,671 | 8,479 | 20,230 | 16,965
Research and development | 1,762 | 1,639 | 3,507 | 3,246
Selling, general, and administrative expenses | 5,615 | 5,674 | 11,670 | 11,494
Operating Income | 3,294 | 1,166 | 5,053 | 2,225
Other expense: |  |  |  |
Interest expense, net | 6 | 22 | 13 | 48
Income before Provision for Income Taxes | 3,288 | 1,144 | 5,040 | 2,177
Provision (benefit) for Income Taxes | 419 | (89) | 667 | 54
Net Income | $ 2,869 | $ 1,233 | $ 4,373 | $ 2,123
Income per share: |  |  |  |
Basic | $ 0.15 | $ 0.07 | $ 0.23 | $ 0.11
Diluted | $ 0.15 | $ 0.07 | $ 0.23 | $ 0.11
Weighted average number of shares outstanding: |  |  |  |
Basic | 18,603,000 | 18,849,000 | 18,665,000 | 18,848,000
Diluted | 18,649,000 | 18,883,000 | 18,713,000 | 18,881,000

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