13. PROPERTY, PLANT AND EQUIPMENT

Changes in property, plant and equipment for financial years ended on December 31, 2020 and 2019 are as follows:


	Gross carrying amount							Depreciation
	At the													Net
	beginning				Additions by		At the	At the		Additions by				carrying
	of the	Useful			business		end of	beginning		business	Of the	Other	At the end	amount
Item	year	Life	Revaluation	Additions	combinations	Disposals	the year	of the year	Disposals	combinations	Year	Movements	of the year	12/31/2020
Cost model
Furniture and facilities	1,373,239	10	—	77,415	—	(30,084)	1,420,570	(949,089)	(85,526)	—	(100,150)	—	(1,134,765)	285,805
Machinery and equipment	4,296,555	5	—	1,326,532	—	(436,367)	5,186,720	(3,822,034)	(238,037)	—	(308,075)	—	(4,368,146)	818,574
Vehicles	235,652	5	—	72,255	—	(47,045)	260,862	(101,041)	25,273	—	(44,344)	—	(120,112)	140,750
Right of use assets	2,047,260	—	—	803,901	—	(704,233)	2,146,928	(771,302)	604,923	—	(780,397)	—	(946,776)	1,200,152
Construction in progress	653,718	—	—	152,146	—	(167,470)	638,394	—	—	—	—	—	—	638,394
Revaluation model
Land and Buildings	2,600,111	50	818,447	786,020	—	(1,846)	4,202,732	(114,615)	2,489	—	(70,643)	—	(182,769)	4,019,963
Total	11,206,535	—	818,447	3,218,269	—	(1,387,045)	13,856,206	(5,758,081)	309,122	—	(1,303,609)	—	(6,752,568)	7,103,638


	Gross carrying amount							Depreciation
	At the													Net
	beginning				Additions by		At the	At the		Additions by				carrying
	of the	Useful			business		end of	beginning		business	Of the	Other	At the end	amount
Item	year	Life	Revaluation	Additions	combinations	Disposals	the year	of the year	Disposals	combinations	Year	Movements	of the year	12/31/2019
Cost model
Furniture and facilities	1,373,239	10	—	—	—	—	1,373,239	(944,414)	—	—	(4,675)	—	(949,089)	424,150
Machinery and equipment	4,226,071	5	—	261,872	—	(191,388)	4,296,555	(3,398,030)	425,780	—	(849,784)	—	(3,822,034)	474,521
Vehicles	236,589	5	—	47,385	—	(48,322)	235,652	(80,055)	21,317	—	(42,303)	—	(101,041)	134,611
Right of use assets	—	6	—	2,047,260	—	—	2,047,260	—	877	—	(772,179)	—	(771,302)	1,275,958
Construction in progress	746,082	—	—	154,345	—	(246,709)	653,718	—	—	—	—	—	—	653,718
Revaluation model
Land and Buildings	2,537,146	50	(84,516)	147,606	—	(125)	2,600,111	(123,271)	40,558	—	(31,902)	—	(114,615)	2,485,496
Total	9,119,127	—	(84,516)	2,658,468	—	(486,544)	11,206,535	(4,545,770)	488,532	—	(1,700,843)	—	(5,758,081)	5,448,454

13.1 Revaluation of Property, Plant and Equipment

The Group´s properties, plant and equipment measured at revaluation model were valued at each reporting date by an independent expert. The frequency of revaluations ensures fair value of the revalued asset does not differ materially from its carrying amount.

The last revaluation was made on December 31, 2020.

The following are the book values that would have been recognized if the assets had been accounted under the cost model:


			Residual
			Value
			according to
	Revaluation	Revalued	the cost
Class	date	amount	model	Difference
Land and buildings	12/31/2020	4,019,963	3,201,516	818,447
Land and buildings	12/31/2019	2,485,496	2,570,012	(84,516)

For all Land and Buildings with a total valuation of 4,020 million as of December 31, 2020, the valuation was determined using sales Comparison Approach prepared by the Group’s management considering a report of an independent expert. Sale prices of comparable properties are adjusted considering the specific aspects of each property, the most relevant premise being the price per meter (Level 3). The Group estimated that, other factors being constant, a 5% reduction on the Sales price per meter for the period ended December 31, 2020 would have reduced the value of the Land and Buildings on 150.7 million, which would impact, net of its tax effect on the "Net Revaluation surplus of property, plant and equipment" item in the statement of comprehensive income.