29. Accounting estimates and assumptions

Changes in impairment loss of employee benefits and provision (without deferred tax liability) – Notes 20 and 21

For the period 01.01.2014 - 31.12.2014For the period 01.01.2013 - 31.12.2013
At the beginning of the period 621 803 406 970
Assumed in business acquisitions - 163 655
Recognised 278 795 247 068
Reversed(-) (32 802) (50 240)
Used (-) (200 345) (145 650)
At the end of the period 667 451 621 803

Changes in impairment loss of property, plant and equipment - Note 10

For the period 01.01.2014 - 31.12.2014For the period 01.01.2013 -31.12.2013
At the beginning of the period 171 844 129 971
Assumed in business acquisitions - 341
Recognised 43 412 47 658
Reversed (-) (874) (2 366)
Used (-) (10 668) (3 760)
At the end of the period 203 714 171 844

Changes in inventories write-downs - Note 15

For the period 01.01.2014 - 31.12.2014For the period 01.01.2013 - 31.12.2013
At the beginning of the period 41 400 21 192
Assumed in business acquisitions - 41 122
Recognised 72 654 44 582
Reversed (-) (39 553) (30 289)
Used (-) (29 338) (35 207)
At the end of the period 45 163 41 400

Changes in impairment loss on receivables - Note 16

For the period 01.01.2014 - 31.12.2014For the period 01.01.2013 - 31.12.2013
At the beginning of the period 78 665 21 291
Assumed in business acquisitions 21 46 529
Recognised 11 760 21 073
Reversed (-) (5 341) (7 354)
Used (-) (10 781) (2 874)
At the end of the period 74 324 78 665