Note 7. Operating expenses

Group	2018	2019
Cost of goods and material	–31,783	–33,104
Employee benefit expense	–26,952	–27,354
Depreciation and amortization	–4,546	–5,704
Impairment losses, inventories	–297	–215
Impairment losses and reversal impairment losses, non–current assets	150	–4,364
Impairment losses, doubtful receivables	–78	–74
Other expenses	–19,293	–20,231
Total	–82,799	–91,045

Other expenses mainly relate to purchases of services and consumables.