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Inventories
 6 Months Ended
Jun. 30, 2020
Text block [abstract]  
Inventories
17.
 
Inventories
 
Million US dollar
  
30 June
2020
   
31 December
2019
 
Prepayments
   75    105 
Raw materials and consumables
   2 356    2 478 
Work in progress
   418    405 
Finished goods
   1 306    1 257 
Goods purchased for resale
   185    182 
  
 
 
   
 
 
 
Inventories
  
 
4 339
 
  
 
4 427
 
  
 
 
   
 
 
 
Inventories other than work in progress
    
Inventories stated at net realizable value
   287    171 
The cost of inventories recognized as an expense in 30 June 2020 amounts to
 
9 097m US dollar, included in cost of sales (31 December 2019: 20 362m US dollar)
.
Impairment losses on inventories recognized during the first six months of 2020 amount to 92m US dollar. The impairment loss includes the write off of obsolete work in progress and finished goods as a result of the
COVID-19
pandemic (30 June 2019: 27m US dollar).