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INVENTORY VALUATION
9 Months Ended
Sep. 30, 2016
Inventory Disclosure [Abstract]  
INVENTORY VALUATION
INVENTORY VALUATION
The valuation of last-in, first-out ("LIFO") method inventories is made at the end of each year based on inventory levels and costs at that time.  Accordingly, interim LIFO calculations are based on management’s estimates of expected year-end inventory levels and costs.  Actual year-end costs and inventory levels may differ from interim LIFO inventory valuations.  The excess of current cost over LIFO cost was $62,239 at September 30, 2016 and $59,765 at December 31, 2015.