G9 Operating expenses

	2019	2020
Cost of goods and material	–33,104	–28,099
Employee benefit expense	–27,383	–23,928
Depreciation and amortization	–5,704	–5,515
Impairment losses, inventories	–215	–270
Impairment losses and reversal impairment losses, non–current assets	–4,364	–450
Impairment losses, doubtful receivables	–74	–102
Other expenses	–20,201	–17,305
Total	–91,045	–75,668

Other expenses mainly relate to purchases of services and consumables.