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Inventories
12 Months Ended
Dec. 31, 2017
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES
Inventories were principally stated at the lower of cost or market with cost determined on the last-in, first-out (LIFO) method. The following presents the effect on inventories, net income and net income per common share had the Company used the first-in, first-out (FIFO) inventory valuation method adjusted for income taxes at the statutory rate in effect at each reporting date and assuming no other adjustments. Management believes that the use of LIFO results in a better matching of costs and revenues. This information is presented to enable the reader to make comparisons with companies using the FIFO method of inventory valuation. The decrease in percentage of total inventories on LIFO in 2017 was due to the Acquisition which only carried approximately 40 percent of its inventory on the LIFO method.
 
2017
 
2016
 
2015
Percentage of total
inventories on LIFO
66
%
 
79
%
 
78
%
Excess of FIFO over
LIFO
$
286,961

 
$
253,353

 
$
251,060

(Decrease) increase in net
income due to LIFO
(20,669
)
 
(1,421
)
 
49,658

(Decrease) increase in net
income per common
share due to LIFO
(.22
)
 
(.02
)
 
.53