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Net exchange rate gains (losses) (Tables)
 12 Months Ended
Dec. 31, 2018
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Schedule of Net Exchange Rate Gains (Losses)

Net exchange rate gains (losses) are analysed as follows:

 

     2018      2017  

Net realised gains (losses) on derivative instruments

      (906 )       1,912  

Net realised gains (losses) on accounts receivable and payable

      3,353        445  
  

 

 

     

 

 

  

Total net realised gains (a)

      2,447        2,357  
  

 

 

     

 

 

  

Net unrealised gains (losses) on derivative instruments

      (57 )       943  

Net unrealised gains (losses) on accounts receivable and payable

      (5,437 )       (48 ) 

Net unrealised gains (losses) on non-monetary assets

      (867 )       (2,219 ) 
  

 

 

     

 

 

  

Total net unrealised losses (b)

      (6,361 )       (1,324 ) 
  

 

 

     

 

 

  

Total realised and unrealised exchange rate gains (losses) (a+b)

      (3,914 )       1,033