Trade Accounts Payable

12 Months Ended

Dec. 31, 2019

20	TRADE ACCOUNTS PAYABLE

As of December 31, this item includes:


	2018		2019
Invoices payable (a)		591,619		352,287
Provision of contract costs (b)		378,670		746,408
Notes payable		109,242		37,426

		1,079,531		1,136,121

(a)

Invoices payable are obligations accredited with formal documents. The following are the invoices payable according to main projects:


	2018		2019
Infrastructure
Linea 1 - Metro de Lima		93,463		15,125
Oil services		49,254		46,932
Operation and maintenance - Roads		60,334		16,131

		203,051		78,188

Engineering and Construction
Works and Consortiums		128,159		64,571
Talara Refinery		101,103		59,740
Engineering and Construction Works VYV - DSD Chile Ltda.		26,184		26,368
Civil Works, Assembly and Electromechanics - Toquepala		23,957		10,325
North Concentrator Plant - Quellaveco		7,564		26,589
Engineering and Construction Works - Morelco S.A.S.		19,504		8,141
Generating Plant Machu Picchu		7,789		6,575
Project Mina Gold Fields La Cima S.A.		5,060		5,302
Civil works, assembly and electromechanics - Acero Arequipa		3,062		5,421
Others		5,319		15,091

		327,701		228,123

Real E state		18,365		26,072

Parent Company Operation		42,502		19,904

		591,619		352,287

Provision of contract costs are obligations not accredited with formal documents. Below are the services received not billed according to main projects:


	2018		2019
Infrastructure
Linea 1 - Metro de Lima		11,189		13,383
Oil services		—		20,512
Operation and maintenance - Roads		1,020		18,763

		12,209		52,658

Engineering and Construction
Talara Refinery		115,870		418,540
Works and Consortiums		105,681		68,239
Engineering and Construction Works VYV - DSD		51,412		68,140
Engineering and Construction Works - Morelco SAS		27,570		34,804
North Concentrator Plant - Quellaveco		10,030		24,185
Mina Project of Gold Fields La Cima S.A.		8,520		15,050
Civil Works, Assembly and Electromechanics - Acero Arequipa		4,932		17,382
Civil Works, Assembly and Electromechanics - Toquepala		5,283		5,055
Generating Plant Machu Picchu		2,376		4,633
Others		8,513		23,063

		340,187		679,091

Real E state		12,808		13,573

Parent Company Operation		13,466		1,086

		378,670		746,408