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Segment Disclosure - Net Income by Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 25, 2014 | Jan. 26, 2013 | Jan. 25, 2014 segment | Jan. 26, 2013
Segment Reporting Information |  |  |  |
Number of business units |  |  | 5 |
Net sales | $ 115,369 | $ 111,050 | $ 415,730 | $ 393,840
Contribution margin | 15,901 | 13,397 | 67,846 | 66,263
Depreciation and amortization |  |  |  |
Depreciation and amortization | 3,581 | 3,954 | 10,952 | 11,785
Non-allocated operating expenses: |  |  |  |
General and administrative | 6,685 | 6,717 | 20,788 | 20,148
Product design and development | 5,649 | 5,611 | 17,330 | 17,477
Operating income | 3,567 | 1,069 | 29,728 | 28,638
Nonoperating income (expense): |  |  |  |
Interest income | 290 | 386 | 945 | 1,165
Interest expense | (62) | (28) | (189) | (151)
Other (expense) income, net | (237) | (193) | (351) | (224)
Income before income taxes | 3,558 | 1,234 | 30,133 | 29,428
Income tax expense (benefit) | 687 | (1,476) | 9,753 | 8,493
Net income | 2,871 | 2,710 | 20,380 | 20,935
Commerical |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 39,016 | 30,997 | 117,690 | 109,127
Contribution margin | 7,903 | 4,262 | 24,026 | 19,030
Depreciation and amortization |  |  |  |
Depreciation and amortization | 1,064 | 1,253 | 3,181 | 3,746
Live Events |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 33,428 | 26,528 | 146,680 | 121,641
Contribution margin | 4,530 | 1,244 | 23,159 | 16,393
Depreciation and amortization |  |  |  |
Depreciation and amortization | 1,092 | 1,095 | 3,354 | 3,361
Schools & Theatres |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 11,010 | 11,778 | 47,750 | 51,639
Contribution margin | (217) | 80 | 5,286 | 6,091
Depreciation and amortization |  |  |  |
Depreciation and amortization | 513 | 546 | 1,588 | 1,683
Transportation |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 13,531 | 23,546 | 41,811 | 57,713
Contribution margin | 2,842 | 6,317 | 9,747 | 18,321
Depreciation and amortization |  |  |  |
Depreciation and amortization | 292 | 385 | 856 | 1,054
International |  |  |  |
Segment Reporting Information |  |  |  |
Net sales | 18,384 | 18,201 | 61,799 | 53,720
Contribution margin | 843 | 1,494 | 5,628 | 6,428
Depreciation and amortization |  |  |  |
Depreciation and amortization | 210 | 206 | 629 | 565
Unallocated |  |  |  |
Depreciation and amortization |  |  |  |
Depreciation and amortization | $ 410 | $ 469 | $ 1,344 | $ 1,376

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