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INVENTORIES
 12 Months Ended
Dec. 31, 2017
Inventories [Abstract]  
INVENTORIES
INVENTORIES:
 
December 31, 2017

 
January 1, 2017

 
 
 
 
 
 
Raw materials and spare parts inventories
$
128,414

 
$
119,155

Work in progress
60,743

 
56,397

Finished goods
756,581

 
779,324

 
$
945,738

 
$
954,876



The amount of inventories recognized as an expense and included in cost of sales was $1,884.8 million for fiscal 2017 (2016 - $1,810.3 million), which included an expense of $18.0 million (2016 - $11.3 million) related to the write-down of inventory to net realizable value.