53. Operating costs

  for the 3 months ended
 Note31 December 2016 unaudited31 December 2015 unaudited
Technical costs and cost of settlements with telecommunication operators 472.6585.1
Depreciation, amortization, impairment and liquidation 512.4436.7
Cost of equipment sold 380.1393.6
Content costs 297.3299.1
Distribution, marketing, customer relation management and retention costs 222.5220.1
Salaries and employee-related costsa163.9158.0
Cost of debt collection services and bad debt allowance and receivables written off 15.37.6
Other costs 76.559.1
Total  2,140.62,159.3
 

a)Salaries and employee-related costs

 for the 3 months ended
 31 December 2016 unaudited31 December 2015 unaudited
Salaries140.2136.1
Social security contributions18.516.8
Other employee-related costs5.25.1
Total163.9158.0