Note 7. Operating expenses

Group	2017	2018
Cost of goods and material	–28,092	–31,748
Employee benefit expense	–26,550	–26,952
Depreciation and amortization	–4,581	–4,546
Impairment losses, inventories	–408	–297
Impairment losses and reversal impairment losses, non-current assets	–349	150
Impairment losses, doubtful receivables	–111	–78
Other expenses	–16,938	–19,343
Total	–77,029	–82,814

Other expenses mainly relate to purchases of services and consumables.