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Property, plant, equipment and development costs (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Property, plant, equipment and development costs |
Schedule of property, plant and equipment, net | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Balance as of |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | Balance as of |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | Balance as of
​ | ​ | January 1, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Changes in | ​ | Reclassifications | ​ | December 31, | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Changes in | ​ | Reclassifications | ​ | December 31,
​ | ​ | 2021 | ​ | Additions | ​ | Disposals | ​ | Sales | ​ | estimations | ​ | and transfers | ​ | 2021 | ​ | Additions | ​ | Disposals | ​ | Sales | ​ | estimations | ​ | and transfers | ​ | 2022
​ |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) | ​ | US$(000) |  | US$(000)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cost: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Lands |  | 17,650 |  | — |  | — |  | — |  | — |  | 53 |  | 17,703 |  | — |  | — |  | — |  | — | ​ | 1,062 |  | 18,765
Mining concessions (f) |  | 151,873 |  | — |  | — |  | — |  | — |  | — |  | 151,873 |  | — |  | — |  | — |  | — | ​ | — |  | 151,873
Development costs |  | 813,232 |  | 31,749 |  | — |  | — |  | — |  | — |  | 844,981 |  | 59,702 |  | — |  | — |  | — | ​ | — |  | 904,683
Buildings, constructions and other |  | 1,343,060 |  | 31 |  | (11) |  | — |  | — |  | 7,315 |  | 1,350,395 |  | — |  | (123) |  | — |  | — | ​ | 3,510 |  | 1,353,782
Machinery and equipment |  | 883,192 |  | 5 |  | (393) |  | (249) |  | — |  | 19,842 |  | 902,397 |  | 10 |  | (41,053) |  | (34) |  | — | ​ | 12,695 |  | 874,015
Transportation units |  | 8,409 |  | 70 |  | (152) |  | (934) |  | — |  | 269 |  | 7,662 |  | 15 |  | (277) |  | (1,816) |  | — | ​ | 73 |  | 5,657
Furniture and fixtures |  | 11,737 |  | 33 |  | (98) |  | — |  | — |  | 98 |  | 11,770 |  | — |  | (702) |  | (4) |  | — | ​ | 7 |  | 11,071
Units in transit |  | 3,381 |  | — |  | (506) |  | — |  | — |  | — |  | 2,875 |  | 12,811 |  | — |  | — |  | — | ​ | — |  | 15,686
Work in progress |  | 34,934 |  | 40,768 |  | (1,838) |  | — |  | — |  | (27,577) |  | 46,287 |  | 65,577 |  | (3,049) |  | — |  | — | ​ | (17,347) |  | 91,468
Stripping activity asset (g) |  | 152,597 |  | 17,653 |  | (6,763) |  | — |  | — |  | — |  | 163,487 |  | 26,669 |  | — |  | — |  | — | ​ | — |  | 190,156
Right-of-use asset (e) | ​ | 16,259 | ​ | — | ​ | — | ​ | — | ​ | 2,973 | ​ | — | ​ | 19,232 | ​ | — | ​ | — | ​ | — | ​ | 11,712 | ​ | — | ​ | 30,944
Mine closure costs |  | 335,654 |  | — |  | — |  | — |  | (3,272) |  | — |  | 332,382 |  | — |  | — |  | — |  | (21,869) | ​ | — |  | 310,513
​ |  | 3,771,978 |  | 90,309 |  | (9,761) |  | (1,183) |  | (299) |  | — |  | 3,851,044 |  | 164,784 |  | (45,204) |  | (1,854) |  | (10,157) | ​ | — |  | 3,958,613
Accumulated depreciation and amortization: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mining concessions (f) |  | 40,270 |  | 7 |  | - |  | - |  | — |  | — |  | 40,277 |  | 6 |  | — |  | — |  | — | ​ | — |  | 40,283
Development costs |  | 340,999 |  | 20,582 |  | - |  | - |  | — |  | — |  | 361,581 |  | 26,907 |  | — |  | — |  | — | ​ | — |  | 388,488
Buildings, construction and other |  | 698,324 |  | 66,445 |  | (3) |  | - |  | — |  | 928 |  | 765,694 |  | 58,345 |  | (121) |  | — |  | — | ​ | — |  | 823,918
Machinery and equipment |  | 686,466 |  | 56,384 |  | (340) |  | (170) |  | — |  | — |  | 742,340 |  | 42,698 |  | (40,355) |  | (34) |  | — | ​ | — |  | 744,649
Transportation units |  | 7,083 |  | 604 |  | (143) |  | (894) |  | — |  | — |  | 6,650 |  | 478 |  | (153) |  | (1,803) |  | — | ​ | — |  | 5,172
Furniture and fixtures |  | 9,824 |  | 601 |  | (97) |  | - |  | — |  | — |  | 10,328 |  | 548 |  | (651) |  | (4) |  | — | ​ | — |  | 10,221
Stripping activity asset |  | 111,455 |  | 14,039 |  | - |  | - |  | — |  | 6,665 |  | 132,159 |  | 21,769 |  | — |  | — |  | — | ​ | — |  | 153,928
Right-of-use asset (e) | ​ | 9,081 | ​ | 4,813 | ​ | - | ​ | - | ​ | — | ​ | — | ​ | 13,894 | ​ | 4,290 | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 18,184
Mine closure costs |  | 191,840 |  | 14,819 |  | - |  | - |  | — |  | 7,173 |  | 213,832 |  | 18,198 |  | — |  | — |  | — | ​ | — |  | 232,030
​ |  | 2,095,342 |  | 178,294 |  | (583) |  | (1,064) |  | — |  | 14,766 |  | 2,286,755 |  | 173,239 |  | (41,280) |  | (1,841) |  | — | ​ | — |  | 2,416,873
Provision for impairment of long-lived assets: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Mine closure costs |  | 13,207 |  | — |  | (3,828) |  | — |  | (7,173) |  | (7,173) |  | 2,206 |  | — |  | — |  | — | ​ | — | ​ | — |  | 2,206
Development costs |  | 10,153 |  | — |  | — |  | — |  | (6,665) |  | (6,665) |  | 3,488 |  | — |  | — |  | — | ​ | — | ​ | — |  | 3,488
Property, plant and other |  | 2,915 |  | 19,874 |  | (1,136) |  | — |  | (928) |  | (928) |  | 20,725 |  | — |  | (19,874) |  | — | ​ | — | ​ | — |  | 851
​ |  | 26,275 |  | 19,874 |  | (4,964) |  | — |  | (14,766) |  | (14,766) |  | 26,419 |  | — |  | (19,874) |  | — | ​ | — | ​ | — |  | 6,545
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net cost |  | 1,650,361 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 1,537,870 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 1,535,195
​
Schedule of estimates prices for the current and long-term periods | Estimated prices for the current and long-term periods that have been used to estimate future cash flows are as follows: ​ As of December 31, 2022 - ​
​ | ​ | ​ | ​ | ​
​ | ​ | 2023 |  | 2024-2026
​ |  | US$ |  | US$
​ | ​ | ​ | ​ | ​
Gold |  | 1,750 / Oz |  | 1,735 / Oz
Silver |  | 21.00 / Oz |  | 23.17 / Oz
Copper |  | 7,900 / MT |  | 9,625 / MT
Zinc | ​ | 3,000 / MT | ​ | 2,648 / MT
Lead |  | 1,900 / MT |  | 2,181 / MT
​ As of December 31, 2021 - ​
​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2023-2025
​ | ​ | US$ | ​ | US$
​ | ​ | ​ | ​ | ​
Gold |  | 1,700 / Oz |  | 1,764 / Oz
Silver |  | 24.00 / Oz |  | 27.30 / Oz
Copper |  | 8,500 / MT |  | 8,705 / MT
Zinc |  | 2,600 / MT |  | 2,616 / MT
Lead | ​ | 2,000 / MT | ​ | 2,313 / MT
​
Schedule of net assets for right in use | ​
​ | ​ | ​ | ​ | ​
​ | ​ | 2022 |  | 2021
​ | ​ | US$(000) | ​ | US$(000)
Buildings | ​ | 10,484 |  | 2,088
Transportation units | ​ | 1,380 |  | 2,501
Machinery and equipment | ​ | 896 |  | 749
​ | ​ | ​ | ​ | ​
​ | ​ | 12,760 |  | 5,338
​
Summary of recovery amounts of long lived assets | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
​ | ​ | US$ | ​ | US$ | ​ | US$
​ | ​ | ​ | ​ | ​ | ​ | ​
Uchucchacua |  | 146,114 |  | 196,545 |  | 244,795
Río Seco |  | 50,808 |  | 18,671 |  | N/A
Orcopampa |  | 51,911 |  | 43,128 |  | 57,650
La Zanja |  | 35,011 |  | 51,044 |  | 20,736
Julcani |  | N/A |  | N/A |  | 40,642
El Brocal |  | N/A |  | N/A |  | 761,081
​
Schedule of discount rate | In calculating the value in use, as of December 31, 2022 and 2021 the following discount rates were applied to the post-tax cash flows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | 2022 | ​ | 2021
​ | ​ | Post-Tax | ​ | Pre-Tax | ​ | Post-Tax | ​ | Pre-Tax
​ | ​ | % | ​ | % | ​ | % | ​ | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Uchucchacua |  | 8.12 |  | 12.52 |  | 6.04 |  | 9.31
Orcopampa |  | 8.12 |  | 12.52 |  | 6.04 |  | 9.31
Río Seco |  | 10.60 |  | 16.34 |  | 7.86 |  | 12.12
La Zanja |  | 9.13 |  | 14.08 |  | 7.01 |  | 10.81
​
Schedule of distribution of depreciation expenses | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021 |  | 2020
​ | ​ | US$(000) | ​ | US$(000) | ​ | US$(000)
​ | ​ | ​ | ​ | ​ | ​ | ​
Cost of sales of goods |  | 147,032 |  | 159,652 | ​ | 174,103
Unabsorbed cost due to production stoppage |  | 14,877 |  | 4,569 | ​ | 10,764
Cost of sales of services |  | 8,153 |  | 8,109 | ​ | 8,461
Administrative expenses |  | 1,886 |  | 4,741 | ​ | 3,142
Property, plant, equipment and development costs | ​ | 1,039 | ​ | 963 | ​ | 833
Exploration in non-operating areas | ​ | 101 | ​ | 114 | ​ | 111
Selling expenses | ​ | 93 | ​ | 84 | ​ | —
Other, net | ​ | 49 | ​ | 48 | ​ | 46
Discontinued operations, note 1(e) |  | 9 |  | 14 | ​ | 2,126
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 173,239 |  | 178,294 | ​ | 199,586
Sociedads Minera Cerro Verde S.A.A. |
Property, plant, equipment and development costs |
Schedule of property, plant and equipment, net | Property, plant and equipment consist of owned and leased assets (right-of-use assets), and cost and accumulated depreciation accounts as of December 31, 2022 and 2021 are shown below: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​ | ​ | ​ | Adjustments | ​ | ​ | ​ | ​ | ​ | December 31, | ​ | ​ | ​ | Adjustments | ​ | ​ | ​ | ​ | ​ | December 31,
​ |  | 2020 |  | Additions |  | and changes in |  | Disposals |  | Transfers |  | 2021 |  | Additions |  | and changes in |  | Disposals |  | Transfers |  | 2022
​ | ​ | ​ | ​ | ​ | ​ | estimates | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | estimates | ​ | ​ | ​ | ​ | ​ | ​
​ |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000) |  | US$(000)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Cost | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Land |  | 24,905 |  | — |  | — |  | — |  | 5,477 |  | 30,382 |  | — |  | — |  | — |  | 2,820 |  | 33,202
Buildings and other constructions |  | 2,589,004 |  | — |  | 430 |  | (913) |  | 7,885 |  | 2,596,406 |  | — |  | 1,041 |  | (61) |  | 11,063 |  | 2,608,449
Machinery and equipment |  | 4,985,749 |  | — |  | (430) |  | (14,967) |  | 128,007 |  | 5,098,359 |  | — |  | (1,041) |  | (54,732) |  | 155,044 |  | 5,197,630
Transportation units |  | 30,098 |  | — |  | — |  | (1,132) |  | 4,416 |  | 33,382 |  | — |  | — |  | — |  | 2,995 |  | 36,377
Furniture and fixtures |  | 949 |  | — |  | — |  | (377) |  | — |  | 572 |  | — |  | — |  | — |  | — |  | 572
Other equipment |  | 30,965 |  | — |  | — |  | (92) |  | 4,522 |  | 35,395 |  | — |  | — |  | (58) |  | 885 |  | 36,222
Construction in progress and in-transit units |  | 118,430 |  | 158,599 | (a) | (195) |  | — |  | (150,307) |  | 126,527 |  | 227,216 | ​ | (19) |  | — |  | (169,459) |  | 184,265
Stripping activity asset (see Note 2(i)) |  | 945,637 |  | 214,192 |  | — |  | — |  | — |  | 1,159,829 |  | 304,198 |  | — |  | — |  | — |  | 1,464,027
Asset retirement costs (see Note 11(b)) |  | 204,567 |  | — |  | (18,271) |  | — |  | — |  | 186,296 |  | — |  | (17,812) |  | — |  | — |  | 168,484
Right-of-use assets (b) | ​ | 96,451 | ​ | 4,099 | ​ | — | ​ | (1,650) | ​ | — | ​ | 98,900 | ​ | 4,941 | ​ | — | ​ | (3,137) | ​ | (3,348) | ​ | 97,356
​ |  | 9,026,755 |  | 376,890 |  | (18,466) |  | (19,131) |  | — |  | 9,366,048 |  | 536,355 |  | (17,831) |  | (57,988) |  | — |  | 9,826,584
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated depreciation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Buildings and other constructions |  | 456,213 |  | 66,846 |  | 236 |  | (914) |  | — |  | 522,381 |  | 72,899 |  | 655 |  | (14) |  | — |  | 595,921
Machinery and equipment |  | 2,305,568 |  | 279,531 |  | (236) |  | (14,891) |  | — |  | 2,569,972 |  | 272,528 |  | (655) |  | (54,519) |  | 141 |  | 2,787,467
Transportation units |  | 17,698 |  | 1,969 |  | — |  | (1,040) |  | — |  | 18,627 |  | 2,160 |  | — |  | — |  | — |  | 20,787
Furniture and fixtures |  | 904 |  | 23 |  | — |  | (376) |  | — |  | 551 |  | 21 |  | — |  | — |  | — |  | 572
Other equipment |  | 21,240 |  | 2,942 |  | — |  | (92) |  | — |  | 24,090 |  | 3,136 |  | — |  | (58) |  | — |  | 27,168
Stripping activity asset |  | 678,041 |  | 113,530 |  | — |  | — |  | — |  | 791,571 |  | 134,186 |  | — |  | — |  | — |  | 925,757
Asset retirement costs |  | 31,526 |  | 5,388 |  | — |  | — |  | — |  | 36,914 |  | 4,770 |  | — |  | — |  | — |  | 41,684
Right-of-use assets (b) | ​ | 19,589 | ​ | 12,459 | ​ | — | ​ | (1,640) | ​ | — | ​ | 30,408 | ​ | 12,708 | ​ | — | ​ | (3,124) | ​ | (141) | ​ | 39,851
​ |  | 3,530,779 |  | 482,688 |  | — | ​ | (18,953) |  | — |  | 3,994,514 |  | 502,408 |  | — | ​ | (57,715) |  | — | ​ | 4,439,207
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net cost |  | 5,495,976 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 5,371,534 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | 5,387,377
| (a) | As of December 31, 2022 additions to construction in progress and in-transit units primarily relate to (i) tailings dam projects (US$ 55.5 million), (ii) projects associated with the capitalization of main components of the mine’s heavy equipment (US$36.1 million), (iii) mine support equipment (US$32.6 million), (iv) belt replacement projects (US$11.1 million), (v) a direct flotation reactor technology project (US$11.0 million), (vi) the purchase of stators for ball mills (US$10.7 million), and (vii) installation of flotation recovery technology (US$8.5 million).
As of December 31, 2021, additions to construction in progress and in-transit units primarily relate to (i) tailings dam projects (US$30.1 million), (ii) projects associated with the capitalization of main components of the mine’s heavy equipment (US$ 28.9 million), (iii) the purchase of stators for ball mills (US$ 18.7 million), (iv) the purchase of mine support equipment (US$ 17.3 million), (v) major maintenance on shovels (US$ 9.2 million), (vi) the purchase of rollers (US$ 9.0 million), (vii) belt replacement projects (US$ 7.9 million), (viii) major components of the primary crusher (US$ 4.3 million), (ix) haul trucks beds (US$ 3.2 million) and (x) projects for the optimization of the Company’s operating processes (US$ 2.5 million).
Schedule of net assets for right in use | As of December 31, 2022, additions to construction in progress include capitalized interest with an average rate of 4.25% primarily related to (i) capital projects for the maintenance truck shop (US$1.5 million), (ii) tailings dam projects (US$1.2 million), (iii) the purchase of stators for ball mills (US$0.1 million) and (iv) other projects (US$0.3 million). As of December 31, 2021, additions to construction in progress include capitalized interest with an average rate of 2.88% primarily related to (i) capital projects for the maintenance truck shop (US$ 1.0 million), (ii) tailings dam projects (US$ 0.4 million), (iii) the purchase of stators (US$ 0.2 million) and (iv) other projects US$ 0.3 million). (b) Set out below are the carrying amounts of right-of-use assets recognized and the movements as of December 31, 2022 and 2021: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December |  |  |  | ​ | ​ | December | ​ | ​ | ​ | ​ |  | ​ | ​ | December
​ | ​ | 31, 2020 | ​ | Additions | ​ | Disposals | ​ | 31, 2021 | ​ | Additions | ​ | Disposals | ​ | Transfers | ​ | 31, 2022
​ | ​ | US$(000) | ​ | US$(000) | ​ | US$(000) | ​ | US$(000) | ​ | US$(000) | ​ | US$(000) | ​ | US$(000) | ​ | US$(000)
Cost |  |  |  |  |  |  | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ |
Land |  | 9,851 |  | 789 |  | — | ​ | 10,640 | ​ | 216 | ​ | (365) |  | — | ​ | 10,491
Buildings and other constructions |  | 56,594 |  | 2,195 |  | (873) | ​ | 57,916 | ​ | 1,273 | ​ | (2,668) |  | — | ​ | 56,521
Machinery and equipment |  | 30,006 |  | 1,115 |  | (777) | ​ | 30,344 | ​ | 3,452 | ​ | (104) |  | (3,348) | ​ | 30,344
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | 96,451 |  | 4,099 |  | (1,650) | ​ | 98,900 | ​ | 4,941 | ​ | (3,137) |  | (3,348) | ​ | 97,356
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accumulated depreciation |  | ​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​
Land |  | 2,897 |  | 1,732 |  | — | ​ | 4,629 | ​ | 1,949 | ​ | (365) |  | — | ​ | 6,213
Buildings and other constructions |  | 10,575 |  | 7,480 |  | (865) | ​ | 17,190 | ​ | 7,216 | ​ | (2,656) |  | — | ​ | 21,750
Machinery and equipment |  | 6,117 |  | 3,247 |  | (775) | ​ | 8,589 | ​ | 3,543 | ​ | (103) |  | (141) | ​ | 11,888
​ |  | 19,589 |  | 12,459 |  | (1,640) | ​ | 30,408 | ​ | 12,708 | ​ | (3,124) | ​ | (141) | ​ | 39,851
​ |  | ​ |  | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​
Net cost |  | 76,862 |  | ​ |  |  | ​ | 68,492 | ​ | ​ | ​ | ​ |  | ​ | ​ | 57,505

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