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Unaudited Quarterly Financial Information (Tables) | 12 Months Ended
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Dec. 28, 2013
Results of Operations for Each Quarter | Results of operations for each of the four quarters in the respective fiscal years are as follows. Each quarter represents a period of twelve weeks, except the first quarter, which includes sixteen weeks.
|  |  |  |  | First Quarter |  |  | Second Quarter |  |  | Third Quarter |  |  | Fourth Quarter |
|  | (Amounts in thousands, except per share data) |
Sales |  |  | 2013 |  |  | $ | 1,130,810 |  |  | $ | 898,153 |  |  | $ | 878,492 |  |  | $ | 843,550 |
|  |  | 2012 |  |  | $ | 898,206 |  |  | $ | 681,561 |  |  | $ | 717,282 |  |  | $ | 749,442 |
Materials, supplies, labor and other production costs (exclusive of depreciation and amortization shown separately) |  |  | 2013 |  |  | $ | 585,298 |  |  | $ | 471,614 |  |  | $ | 467,798 |  |  | $ | 447,511 |
|  |  | 2012 |  |  | $ | 478,978 |  |  | $ | 365,658 |  |  | $ | 382,508 |  |  | $ | 390,666 |
Net income. |  |  | 2013 |  |  | $ | 112,026 |  |  | $ | 46,460 |  |  | $ | 33,888 |  |  | $ | 38,520 | *
|  |  | 2012 |  |  | $ | 37,943 |  |  | $ | 28,380 |  |  | $ | 31,231 |  |  | $ | 38,567 |
Basic net income per share |  |  | 2013 |  |  | $ | 0.54 |  |  | $ | 0.22 |  |  | $ | 0.16 |  |  | $ | 0.18 | *
|  |  | 2012 |  |  | $ | 0.19 |  |  | $ | 0.14 |  |  | $ | 0.15 |  |  | $ | 0.18 |
Diluted net income per share |  |  | 2013 |  |  | $ | 0.53 |  |  | $ | 0.22 |  |  | $ | 0.16 |  |  | $ | 0.18 | *
|  |  | 2012 |  |  | $ | 0.19 |  |  | $ | 0.14 |  |  | $ | 0.15 |  |  | $ | 0.18 |
* | Includes an out-of-period adjustment of $4.4 million ($2.7 million, net of tax) described above.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=25249566&loc=d3e1280-108306 + Details
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