| 8. | Inventories |
| (a) | This caption is made up as follows: |
| 2017 | 2016 | |||||||
| S/(000) | S/(000) | |||||||
| Goods and finished products | 27,386 | 21,427 | ||||||
| Work in progress | 105,882 | 107,882 | ||||||
| Raw materials | 74,477 | 71,248 | ||||||
| Packages and packing | 1,975 | 2,045 | ||||||
| Fuel and carbon | 26,986 | 29,033 | ||||||
| Spare parts and supplies | 141,623 | 117,643 | ||||||
| Inventory in transit | 4,093 | 3,941 | ||||||
| 382,422 | 353,219 | |||||||
| Less - Provision for inventory obsolescence and net realizable value (b) | (9,402 | ) | (6,684 | ) | ||||
| 373,020 | 346,535 | |||||||
| (b) | Movement in the provision for inventory obsolescence and net realizable value is set forth below: |
| 2017 | 2016 | 2015 | ||||||||||
| S/(000) | S/(000) | S/(000) | ||||||||||
| Opening balance | 6,684 | 14,055 | 5,146 | |||||||||
| Additions | 3,183 | 1,725 | 9,335 | |||||||||
| Recoveries | (465 | ) | (226 | ) | (426 | ) | ||||||
| Disposals | — | (8,870 | ) | — | ||||||||
| Final balance | 9,402 | 6,684 | 14,055 | |||||||||