Note 2 – Costs divided by type of expence

Group 2017 2016
Material costs 3,372 2,912
Salaries, other remuneration and social security expenses 402 408
Other external costs 451 476
Depreciation and amortization 74 64
Other operating expenses 27 6
Total 4,326 3,866

The specification of costs divided by type of expense refers to items included in the Income Statement under cost of goods sold, selling expenses, administrative expenses and other operating expenses.