pre_text: The line “Construction in progress” in the table above includes property, plant and equipment under construction and equipment under qualification before operating. On January 1, 2019, the Company adopted the new guidance on lease accounting and lease right-of-use assets are included in plant, property and equipment. The impact of the adoption of this new guidance is further described in Note 11. The depreciation charge was $785 million, $727 million and $592 million in 2019, 2018 and 2017, respectively. As described in Note 7, the acquisition of Norstel resulted in the recognition of property, plant and equipment of $11 million.
table: December 31, 2019 Gross Cost Accumulated Depreciation Net Cost
table: Land 78 — 78
table: Buildings 905 (505) 400
table: Facilities & leasehold improvements 3,193 (2,762) 431
table: Machinery and equipment 15,336 (12,790) 2,546
table: Computer and R&D equipment 382 (335) 47
table: Operating lease right-of-use assets 266 (60) 206
table: Other tangible assets 110 (93) 17
table: Construction in progress 282 — 282
table: Total 20,552 (16,545) 4,007
table: December 31, 2018 Gross Cost Accumulated Depreciation Net Cost
table: Land 79 — 79
table: Buildings 902 (487) 415
table: Facilities & leasehold improvements 3,170 (2,748) 422
table: Machinery and equipment 14,882 (12,582) 2,300
table: Computer and R&D equipment 381 (334) 47
table: Other tangible assets 123 (93) 30
table: Construction in progress 202 — 202
table: Total 19,739 (16,244) 3,495
question: Analyse this data from a financial earnings document. What is the average Net Cost?