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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME AND LOSS - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Feb. 23, 2020 | Feb. 24, 2019 | Feb. 23, 2020 | Feb. 24, 2019
Income Statement [Abstract] |  |  |  |
Product sales | $ 152,928 | $ 155,554 | $ 434,235 | $ 404,779
Cost of product sales | 132,881 | 133,985 | 383,338 | 349,988
Gross profit | 20,047 | 21,569 | 50,897 | 54,791
Operating costs and expenses: |  |  |  |
Research and development | 2,747 | 2,739 | 8,390 | 8,005
Selling, general and administrative | 18,783 | 15,588 | 54,000 | 43,791
Restructuring costs | 13,528 | 0 | 13,934 | 0
Total operating costs and expenses | 35,058 | 18,327 | 76,324 | 51,796
Operating (loss) income | (15,011) | 3,242 | (25,427) | 2,995
Dividend income | 281 | 413 | 843 | 1,238
Interest income | 46 | 34 | 96 | 113
Interest expense | (2,211) | (1,771) | (6,455) | (3,275)
Other income, net | 67 | 0 | 61 | 1,600
Net (loss) income from continuing operations before tax | (16,828) | 1,918 | (30,882) | 2,671
Income tax benefit (expense) | 5,310 | (385) | 7,840 | (917)
Net (loss) income from continuing operations | (11,518) | 1,533 | (23,042) | 1,754
Discontinued operations: |  |  |  |
Loss from discontinued operations | 0 | (609) | 0 | (1,415)
Income tax benefit | 0 | 143 | 0 | 333
Loss from discontinued operations, net of tax | 0 | (466) | 0 | (1,082)
Net (loss) income applicable to common stockholders | $ (11,518) | $ 1,067 | $ (23,042) | $ 672
Basic net loss per share: |  |  |  |
(Loss) income from continuing operations (in dollars per share) | $ (0.39) | $ 0.05 | $ (0.79) | $ 0.06
Loss from discontinued operations (in dollars per share) | 0 | (0.02) | 0 | (0.04)
Total basic net loss per share (in dollars per share) | (0.39) | 0.03 | (0.79) | 0.02
Diluted net loss per share: |  |  |  |
(Loss) income from continuing operations (in dollars per share) | (0.39) | 0.05 | (0.79) | 0.06
Loss from discontinued operations (in dollars per share) | 0 | (0.01) | 0 | (0.04)
Total diluted net loss per share (in dollars per share) | $ (0.39) | $ 0.04 | $ (0.79) | $ 0.02
Shares used in per share computation |  |  |  |
Basic (in shares) | 29,170 | 28,919 | 29,155 | 28,140
Diluted (in shares) | 29,170 | 29,151 | 29,155 | 28,399
Other comprehensive loss, net of tax: |  |  |  |
Net unrealized losses on interest rate swaps (net of tax effect of $124, $215, $305, $190) | $ (411) |  | $ (896) |
Net unrealized losses on interest rate swaps (net of tax effect of $124, $215, $305, $190) |  | $ (595) |  | $ (608)
Other comprehensive loss, net of tax | (411) | (595) | (896) | (608)
Total comprehensive (loss) income | $ (11,929) | $ 472 | $ (23,938) | $ 64

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