20 Inventories
  | 
      
  | 
      
  | 
    ||
€ million  | 
      Dec. 31, 2015  | 
      Dec. 31, 2014  | 
    ||
|---|---|---|---|---|
  | 
      
  | 
      
  | 
    ||
Raw materials, consumables and supplies  | 
      4,021  | 
      3,941  | 
    ||
Work in progress  | 
      3,927  | 
      3,552  | 
    ||
Finished goods and purchased merchandise  | 
      23,083  | 
      20,156  | 
    ||
Current lease assets  | 
      3,861  | 
      3,679  | 
    ||
Prepayments  | 
      156  | 
      139  | 
    ||
  | 
      35,048  | 
      31,466  | 
    
At the same time as the relevant revenue was recognized, inventories in the amount of €162,353 million (previous year: €158,108 million) were included in cost of sales. Valuation allowances recognized as expenses in the reporting period amounted to €932 million (previous year: €785 million). Vehicles amounting to €230 million (previous year: €207 million) were assigned as collateral for partial retirement obligations.